# COM-HPC Mini Base-ATX User’s Guide ![Close-up of a black printed circuit board with various electronic components and connectors (no visible text or labels)](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/45f0040287109fcf0e72007b47261c9a5c0c55f61f121166c176949c63a30b47.jpg) Revision History

Revision	Description	Date	Author
0.1	Preliminary release	2025-06-17	AL
0.2	Connectors and pinouts and power input connection updated	2025-06-23	AL
0.3	Power input connection updated	2025-06-25	AL

# Preface # Disclaimer Information in this document is provided in connection with ADLINK products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in ADLINK´s Terms and Conditions of Sale for such products, ADLINK assumes no liability whatsoever, and ADLINK disclaims any express or implied warranty, relating to sale and/or use of ADLINK products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. If you intend to use ADLINK products in or as medical devices, you are solely responsible for all required regulatory compliance, including, without limitation, Title 21 of the CFR (US), Directive 2007/47/EC (EU), and ISO 13485 & 14971, if any. ADLINK may make changes to specifications and product descriptions at any time, without notice. # Environmental Responsibility ADLINK is committed to fulfil its social responsibility to global environmental preservation through compliance with the European Union's Restriction of Hazardous Substances (RoHS) directive and Waste Electrical and Electronic Equipment (WEEE) directive. Environmental protection is a top priority for ADLINK. We have enforced measures to ensure that our products, manufacturing processes, components, and raw materials have as little impact on the environment as possible. When products are at their end of life, our customers are encouraged to dispose of them in accordance with the product disposal and/or recovery programs prescribed by their nation or company. ![A yellow triangular warning sign with a black border containing a black exclamation point in the center.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/e9d92e8e405f4561851517ff05bf988f51a0bd3079814f6c49227964a5b8f847.jpg) California Proposition 65 Warning: This product can expose you to chemicals including acrylamide, arsenic, benzene, cadmium, Tris(1,3- dichloro-2-propyl)phosphate (TDCPP), 1,4-Dioxane, formaldehyde, lead, DEHP, styrene, DINP, BBP, PVC, and vinyl materials, which are known to the State of California to cause cancer, and acrylamide, benzene, cadmium, lead, mercury, phthalates, toluene, DEHP, DIDP, DnHP, DBP, BBP, PVC, and vinyl materials, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. ![The image displays a black-and-white graphic featuring a line drawing of a wheeled trash can. A large black 'X' is crossed over the bin. Below the symbol is a solid black rectangular block. There is no other visible text.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/cdf4a9633c95831f0a8471742aae6651e3caaa81c91b56887bcbe3eddb531844.jpg) # Trademarks Product names mentioned herein are used for identification purposes only and may be trademarks / registered trademarks of respective companies. # Copyright © 2025 ADLINK Technology Incorporated This document contains proprietary information protected by copyright. All rights are reserved. No part of this manual may be reproduced by any mechanical, electronic, or other means in any form without prior written permission of the manufacturer. # Safety Instructions For user safety, please read and follow all Instructions, WARNINGs, CAUTIONs, and NOTEs marked in this manual and on the associated equipment before handling/operating the equipment. Read these safety instructions carefully. Keep this manual for future reference. • Read the specifications section of this manual for detailed information on the operating environment of this equipment. • Turn off power and unplug any power cords/cables when installing/mounting or un-installing/removing equipment. • To avoid electrical shock and/or damage to equipment: • Keep equipment away from water or liquid sources; • Keep equipment away from high heat or high humidity; • Keep equipment properly ventilated (do not block or cover ventilation openings); • Make sure to use recommended voltage and power source settings; • Always install and operate equipment near an easily accessible electrical socket outlet; • Secure the power cord (do not place any object on/over the power cord); • Only install/attach and operate equipment on stable surfaces and/or recommended mountings; • If the equipment will not be used for long periods of time, turn off the power source and unplug the equipment. # Conventions The following conventions may be used throughout this manual, denoting special levels of information ![The image displays a simple icon of a document or memo pad. It features a thick, reddish-orange outline of a white shape with the bottom-right corner folded over. Centered within the white area are two horizontal reddish-orange lines, resembling text.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/c5dc632b2c03142dd08d62ac1d2c402a1c74c66f106094f66e7b09f13bb3bbab.jpg) Note: This information adds clarity or specifics to text and illustrations. ![The image displays a yellow triangular warning sign with a black outline. In the center of the triangle is a white exclamation point.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/24da99b315e00c777b003704f4269583568ce83a0d78566eced2b60259da6e1f.jpg) Caution: This information indicates the possibility of minor physical injury, component damage, data loss, and/or program corruption. ![The image shows a red, triangular warning sign with rounded corners. Inside the red triangle is a white exclamation mark centered vertically and horizontally. This is a standard symbol indicating caution or danger.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/b97a7c4959d0b2a50494236d980396004e2304294930dcb9dfd5c8a489e16b04.jpg) Warning: This information warns of possible serious physical injury, component damage, data loss, and/or program corruption. # Getting Service Ask an Expert: https://www.adlinktech.com/en/Askanexpert # ADLINK Technology, Inc. No. 66, Huaya 1st Rd., Guishan District, Taoyuan City 333411, Taiwan Tel: +886-3-216-5088 Fax: +886-3-328-5706 Email: service@adlinktech.com # Ampro ADLINK Technology, Inc. 6450 Via Del Oro, San Jose, CA 95119-1208, USA Tel: +1-408-360-0200 Toll Free: +1-800-966-5200 (USA only) Fax: +1-408-600-1189 Email: info@adlinktech.com # ADLINK Technology (China) Co., Ltd. 300 Fang Chun Rd., Zhangjiang Hi-Tech Park, Pudong New Area, Shanghai, 201203, China Tel: +86-21-5132-8988 Fax: +86-21-5132-3588 Email: market@adlinktech.com # ADLINK Technology GmbH Hans-Thoma-Strasse 8-10, 68163 Mannheim, Germany Tel: +49-621-43214-0 Fax: +49-621 43214-30 Email: emea@adlinktech.com Please visit the Contact page at www.adlinktech.com for information on how to contact the ADLINK regional office nearest you. # Table of Contents Revision History .. Preface . 1. Introduction ... .10 2. Special Features.. .1 2.1. PCI Express x8 Gen5 ... . 11 2.2. Two Ethernet RJ45.. . 11 2.3. Two USB4 Type-C.. 11 3. Component Location Layout... ..12 4. Functional Diagram... .13 5. Connectors and Pinouts ...... ..14 5.1. Carrier Board Signals — Mini Type.. .. 14 5.2. Connector Location and Pinout Compatibility.... .. 15 5.3. Carrier Board Design... .. 16 5.4. COM-HPC Board-to-board Connectors.. .. 16 5.5. PCIe x8 Slot .. .. 20 5.6. PCIe x4 Slot .. .. 21 5.7. M.2 M-KEY... . 22 5.8. DisplayPort ... .. 22 5.9. eDP ..... .. 23 5.10. Audio HDA .. .. 25 5.11. Audio SNDW .. .. 25 5.12. Ethernet NBASE-T.. .. 26 5.13. USB .. .. 26 5.14. GPIO.. .. 28 5.15. I2C ... ... 28 5.16. UART / COM.. . 29 5.17. eSPI Debug Connector.. . 30 5.18. SMB ... .. 30 5.19. FAN Connector.. . 31 5.20. Carrier BIOS... .. 32 5.21. Front Panel Control.. .. 33 5.22. Other Jumpers ... ... 33 5.23. Power Connectors.. ... 34 6. Carrier BIOS ... ...36 7. Switches, POST, and LEDs.. .37 7.1. Control Switches .. ... 37 7.2. Post Display and LEDs ... .. 37 8. Power Input Connection ...... ...38 8.1. 12V Power Input at 24+4 Pin Power Connectors .. . 38 8.2. 8-20V Power Input at 4-Pin Power Connectors.. ... 39 # List of Figures Figure 1 – Component location.. ..12 Figure 2 – Functional diagram.............. ...13 Figure 3 – Carrier board signals, server type pinout ......... ...14 Figure 4 – COM-HPC mini connector location and pinout compatibility... .15 # 1. Introduction The COM-HPC modular approach, which combines a custom carrier with off-the-shelf system cores, relieves developers and manufacturers from the need to design their own system cores. This not only significantly accelerates their proof of concept but also empowers them to upgrade to latergeneration processors without a complete redesign. The COM-HPC concept reduces engineering complexity, lowers the minimum project quantity threshold, and—most importantly—gets your product to market in no time. On average, designing a carrier board takes less than half the time of creating a full custom board. The COM-HPC Mini Base-ATX, based on PICMG COM-HPC R1.2, is an ATX-sized carrier board intended for validation purposes. With power input via a 24+4 pin power connector (or a 4-pin connector, TBC), and support for a COM-HPC Mini Type module of your choice along with off-the-shelf add-on cards, you can quickly emulate the functionality of your target end product for software development and hardware verification. To build a functional prototype of your target system, you will need: COM-HPC Mini Type module COM-HPC Mini Base-ATX carrier PCI Express-based storage or SATA storage (SATA storage solutions are dependent on module specifications) The COM-HPC Mini Base-ATX is compatible with COM-HPC Mini Type modules and may accommodate: 1x PCI Express x8 slot, up to Gen5 (x4 or x8 configuration depends on module specifications) 1x PCI Express x4 slots and 1x M.2 M-key connector (supports up to 22110 M.2 M-key device) 1x DP ports, 1x eDP connector, and a 3-in-1 Audio port 2x USB4 Type-C, 2x USB3.x Type-A, 2x USB2.0 Type-A, and multiple USB headers for front panel use 2x Ethernet RJ45 connectors, up to 10GBASE-T (speed depends on module specifications) Headers for I2C, SMBus, GPIO, COM ports, and more # 2. Special Features # 2.1. PCI Express x8 Gen5 FHFL PCI Express cards in the PCIE8-15 slot can support up to 2-slot-width PCI Express cards. The capability of PCI Express Gen5 and link configuration depend on the module specifications. # 2.2. Two Ethernet RJ45 2x RJ45 connectors are capable of 10GbE speed, depending on the module specifications. # 2.3. Two USB4 Type-C 2x USB4 Type-C connectors support up to USB3.x and DP alternative mode, depending on the module specifications. # 3. Component Location Layout ![ATX_24\nATX_4\nSM_BATT\nEDP_DSI\nJP45\nJP1\nJP29\nRST_BTN\nSLP_BTN\nLID_BTN\nGP_SPI (opt.)\nF_2XUSB2.0\nSYS_FAN0\nF_MISC\nPVRR_BTN\n8 8\nM.2 Key-M\nPCIE4-7\nM.2\nSATA1 (opt.)\nOnly for SATA USAGE\nSuper I/O\nJP3\nGPIO\nI2CO_SMBUS\n8 8\nRTC (Battery)\nJP5\nCarrier_BIOS\nSystem PD FW\nStore Re-timer FW\nBSEL2\nBSEL1\nBSEL0\nDP_DDI0\nUSB_2 (top)\nUSB_4\nUSBA_SS6\nUSBC_SS2&3\nUSBA_SS7\nUSBC_SS4&5\nETH_0 (top)\nETH_1\nAudio\nAudio Sub\nPCIE8-15\nPCIE0-3\nAudio codec\nCOM1_SER0 COM2_SER1\nCOM1_SER0 COM2_SER1\nSNDW3 (opt.)\nSNDW2 (opt.)\nSNDW1 (opt.)\nSNDW0 (opt.)\nAudio\nRe-timer\nRe-timer\nAudio Sub](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/48728310394753a5703728e271e4dd2574d754ecf101b58b76d5f861d291b551.jpg) Figure 1 – Component location # 4. Functional Diagram ![The diagram is titled **COM-HPC mini Base**. It illustrates the connectivity of a central processor/base block (the large grey vertical rectangle) to various external interfaces and components.\n\n**Central Block Labels:**\nThe central block contains the following interface labels:\n* NBSET 0\n* NBSET 1\n* SS 0-1 (DDI_0)\n* EDP / DSI\n* PCIe 4-5\n* PCIe 6 / SATA_1\n* PCIe 7 / SATA_0\n* PCIe 0-3\n* PCIe 8-11, 12-15\n* GPIO_0-11\n* UART_0-1\n* I2C_0\n* I2C_1\n* Boot_SPI\n* GP_SPI (opt.)\n* SMB\n* ESPI\n* Thermal\n* HDA /S2S/SNDW\n* SNDW(0-1)\n* USB3\n* SS 6 (USB3_1)\n* SS 2-3 (USB4_0)\n* USB0\n* USB5\n* SS 7 (USB3_0)\n* SS 4-5 (USB4_1)\n* USB1\n* USB2\n* USB4\n* USB(6.7)\n* VCC_RTC\n* Miscs.\n\n**Left Side Connections:**\n* **DP:** Connects to SS 0-1 (DDI_0) and EDP / DSI.\n* **Audio Jacks:** Connect to **Audio Codec Realtek ALC888**, which connects to HDA /S2S/SNDW.\n* **USB Headers (Top Pair):** Connect to **TBT4 Intel JHL9040RIT** and **USB PD TI TPS65994BH**, and connect to lines USB3, SS 6 (USB3_1), SS 2-3 (USB4_0), and USB0.\n* **USB Headers (Middle Pair):** Connect to **TBT4 Intel JHL9040RIT** and **USB PD TI TPS65994BH**, and connect to lines USB5, SS 7 (USB3_0), SS 4-5 (USB4_1), and USB1.\n* **USB Headers (Bottom Pair):** Connect directly to USB2 and USB4.\n* **SNDW:** **2xSNDW Headers (SNDW_2 & 3) (opt.)** connects to SNDW(0-1).\n\n**Right Side Connections:**\n* **M.2/SATA:** **M.2 M Key (up to 22110)** and **SATA (optional)** connect via **MUX** blocks to PCIe 6 / SATA_1 and PCIe 7 / SATA_0.\n* **PCIe Slots:** **PCIe x4** connects to PCIe 0-3. **PCIe x8** connects to PCIe 8-11, 12-15.\n* **GPIO/Fan:** **2nd FAN connector** connects to GPIO_0-11, UART_0-1, I2C_0, and I2C_1.\n* **EEPROM:** Connects to Boot_SPI.\n* **Super I/O:** **Super I/O NCT6126D** connects to ESPI (via **ESPI Header**), SMB, Thermal, **COM Header**, **COM Header (COM3)** (via **SP339**), and **2x System FAN connector**. A note states 'eSPI_CS1 enabled required'.\n* **SNDW:** **2xSNDW Headers (opt.)** connects via a dashed line to SNDW(0-1).\n\n**Bottom Connections:**\n* **RTC:** **RTC BAT Clear CMOS** connects to VCC_RTC.\n* **Front Panel:** **2xUSB (front panel)** connects to USB(6.7). **LEDs** and **BTN (PWR, RST, LID, SLP)** connect to Miscs.\n\n**Note:**\n* 'Note: SS means Super Speed Lanes. One SS consists of TX+/-, RX+/-'\n* 'USB0 means USB2.0 D+/D- port 0'](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/907d799a472f8c8456a9322b78ed67543407f09382e07f87018b92ad07313599.jpg) Figure 2 – Functional diagram # 5. Connectors and Pinouts # 5.1. Carrier Board Signals — Mini Type J1 ![| Category | Value |\n|---|---|\n| 12V 5VSB (8-20V opt.) | - |\n| Audio HDA / I2S / Soundwire | - |\n| eDP | - |\n| USB2.0 8x | - |\n| 2x USB3 or USB4_1 | - |\n| 2x USB3 or USB4_3 | - |\n| DDI_0 or USB4_2 | - |\n| DDI_1 or USB4_0 | - |\n| 8x PCIe SATA, SGMII muxed | - |\n| 8x PCIe NVMe, GPU | - |\n| PCIe Target | - |\n| NBASE-T (max. 10G) 2x | - |\n| CAN 1x | - |\n| eSPI | - |](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/8191b5b77ea1c47b98ac4befd4a065d01b947aaf5f04b3ea28b0f365ebeb6212.jpg) Figure 3 – Carrier board signals – mini-type Pinout # 5.2. Connector Location and Pinout Compatibility Connector positions and pinouts comply with the pinout and signal descriptions defined in the PICMG COM-HPC Carrier Design Guide R2. This document includes descriptions of pinouts, signals, and mechanical characteristics specified by the COM-HPC specification. The COM-HPC Mini Base-ATX carrier is compatible with COM-HPC Mini modules and the COM-HPC Module Base Specification R1.2. ![COM+HPC™\nMini\n(95 x 70mm)\nJ1](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/d7c9898dfc5e654362ae2658b46a5fe8a7664e30c71ba5e4f06cc59f3bd0a7b9.jpg) Figure 4 – COM-HPC mini connector location and pinout compatibility # 5.3. Carrier Board Design COM-HPC Mini Base-ATX follows the PICMG COM-HPC Carrier Design Guide where applicable, and its design and schematics have been fully verified. It is recommended to utilize them as references for your carrier board design. COM-HPC Mini Base-ATX schematics and mechanical files, as well as the CDG, can be downloaded from ADLINK COM’s webpage or contact your local ADLINK representative. # 5.4. COM-HPC Board-to-board Connectors Signals and Pinouts for COM-HPC Mini Type Signals described in the specification but not supported on the COM-HPC-mini carrier are marked by STRIKETHROUGH. In addition, the overall feature set also depends on the module specifications.

Row A		Row B		Row C		Row D
A1	VCC	B1	VCC	C1	VCC	D1	VCC
A2	VCC	B2	PWRBTN#	C2	RSTBTN#	D2	VCC
A3	VCC	B3	VCC	C3	VCC	D3	VCC
A4	VCC	B4	THERMTRIP#	C4	CARRIER_HOT#	D4	VCC
A5	RAPID_SHUTDOWN	B5	CAN_TX	C5	CAN_RX	D5	PLTRST#
A6	FUSA_SPI_ALERT	B6	TAMPER#	C6	VIN_PWR_OK	D6	FUSA_SPI_CS#
A7	FUSA_STATUS0	B7	PROCHOT#	C7	CATERR#	D7	FUSA_SPI_CLK
A8	FUSA_STATUS1	B8	SUS_S3#	C8	SUS_S4_S5#	D8	FUSA_SPI_MISO
A9	PCIe_PERST_IN0#	B9	FUSA_VOLTAGE_ERR#	C9	FUSA_ALERT#	D9	FUSA_SPI_MOSI
A10	GND	B10	WD_STROBE#	C10	BATLOW#	D10	WAKE0#
A11	PCIe_REFCLKIN0-	B11	WD_OUT	C11	FAN_PWMOUT	D11	WAKE1#
A12	PCIe_REFCLKIN0+	B12	GND	C12	FAN_TACHIN	D12	GND
A13	GND	B13	USB5-	C13	GND	D13	USB1-
A14	USB7-	B14	USB5+	C14	USB3-	D14	USB1+
A15	USB7+	B15	GND	C15	USB3+	D15	GND
A16	GND	B16	USB4-	C16	GND	D16	USB0-
A17	USB6-	B17	USB4+	C17	USB2-	D17	USB0+
A18	USB6+	B18	GND	C18	USB2+	D18	GND
A19	GND	B19	I2S_LRCLK/SNDW_CLK3/HDA_SYNC	C19	GND	D19	SS01_SDA_AUX-
A20	SS23_SDA_AUX-	B20	I2S_DOUT/SNDW_DAT3/HDA_SDO	C20	SNDW_DMIC_CLK1	D20	SS01_SCL_AUX+
A21	SS23_SCL_AUX+	B21	I2S_MCLK/HDA_RST#	C21	SNDW_DMIC_DAT1	D21	GND
A22	GND	B22	I2S_DIN/SNDW_DAT2/HDA_SDI	C22	GND	D22	SS0_TX-
A23	SS2_TX-	B23	I2S_CLK/SNDW_CLK2/HDA_BCLK	C23	SNDW_DMIC_CLK0	D23	SS0_TX+
A24	SS2_TX+	B24	RSVD	C24	SNDW_DMIC_DAT0	D24	GND
A25	GND	B25	USB67_OC#	C25	GND	D25	SS0_RX-
A26	SS2_RX-	B26	USB45_OC#	C26	USB0_LSRX/DDI1_DDC_AUX_SEL	D26	SS0_RX+
A27	SS2_RX+	B27	USB23_OC#	C27	USB1_LSRX	D27	GND
A28	GND	B28	USB01_OC#	C28	USB0_LSTX/DDI1_HPD	D28	SS1_TX-
A29	SS3_TX-	B29	SML1_CLK	C29	USB1_LSTX	D29	SS1_TX+
A30	SS3_TX+	B30	SML1_DAT	C30	eDP_HPD	D30	GND
A31	GND	B31	PMCALERT#	C31	eDP_VDD_EN	D31	SS1_RX1
A32	SS3_RX-	B32	SML0_CLK	C32	eDP_BKLT_EN	D32	SS1_RX+
A33	SS3_RX+	B33	SML0_DAT	C33	eDP_BKLTCTL	D33	GND
A34	GND	B34	USB_PD_ALERT#	C34	GND	D34	ACPRESENT
A35	eDP_AUX-	B35	USB_PD_I2C_CLK	C35	USB3_AUX-	D35	NBASET1_SDP
A36	eDP_AUX+	B36	USB_PD_I2C_DAT	C36	USB3_AUX+	D36	GND
Row A		Row B		Row C		Row D
A37	GND	B37	USB_RT_ENA	C37	GND	D37	SS6_TX-
A38	eDP_TX0-	B38	USB3_LSRX	C38	SS6_RX-	D38	SS6_TX+
A39	eDP_TX0+	B39	USB3_LSTX	C39	SS6_RX+	D39	GND
A40	GND	B40	USB2_LSRX/DDI0_DDC_AUX_SEL	C40	GND	D40	SS7_TX-
A41	eDP_TX1-	B41	USB2_LSTX/DDI0_HPD	C41	SS7_RX-	D41	SS7_TX+
A42	eDP_TX1+	B42	GND	C42	SS7_RX+	D42	GND
A43	GND	B43	USB1_AUX-	C43	GND	D43	SS4_TX-
A44	eDP_TX2-	B44	USB1_AUX+	C44	SS4_RX-	D44	SS4_TX+
A45	eDP_TX2+	B45	LID#	C45	SS4_RX+	D45	GND
A46	GND	B46	SLEEP#	C46	GND	D46	SS5_TX-
A47	eDP_TX3-	B47	VCC_BOOT_SPI	C47	SS5_RX-	D47	SS5_TX+
A48	eDP_TX3+	B48	BOOT_SPI_CS#	C48	SS5_RX+	D48	GND
A49	GND	B49	BSEL0	C49	GND	D49	NBASET1_MDIO-
A50	eSPI_IO0	B50	BSEL1	C50	BOOT_SPI_IO0	D50	NBASET1_MDIO+
A51	eSPI_IO1	B51	BSEL2	C51	BOOT_SPI_IO1	D51	GND
A52	eSPI_IO2	B52	eSPI_ALERT0#	C52	BOOT_SPI_IO2	D52	NBASET1_MDII-
A53	eSPI_IO3	B53	eSPI_ALERT1#	C53	BOOT_SPI_IO3	D53	NBASET1_MDII+
A54	eSPI_CLK	B54	eSPI_CS0#	C54	BOOT_SPI_CLK	D54	GND
A55	GND	B55	eSPI_CS1#	C55	GND	D55	NBASET1_MDII2-
A56	PCIe_CLKREQ0_LO#	B56	eSPI_RST#	C56	PCIe_REFCLK0_HI-	D56	NBASET1_MDI2+
A57	PCIe_CLKREQ0_HI#	B57	PCIe_WAKE_OUT0#	C57	PCIe_REFCLK0_HI+	D57	GND
A58	PCIe_CLKREQ_OUT0#	B58	NBASET1_LINK_MID#	C58	GND	D58	NBASET1_MDI3-
A59	NBASET1_LINK_MAX#	B59	NBASET1LINK_ACT#	C59	PCIe_REFCLK0_LO-	D59	NBASET1_MDI3+
A60	NBASET1_CTREF	B60	GND	C60	PCIe_REFCLK0_LO+	D60	GND
A61	GND	B61	PCIe08_RX-	C61	GND	D61	PCIe00_TX-
A62	PCIe08_TX-	B62	PCIe08_RX+	C62	PCIe00_RX-	D62	PCIe00_TX+
A63	PCIe08_TX+	B63	GND	C63	PCIe00_RX+	D63	GND
A64	GND	B64	PCIe09_RX-	C64	GND	D64	PCIe01_TX-
A65	PCIe09_TX-	B65	PCIe09_RX+	C65	PCIe01_RX-	D65	PCIe01_TX+
A66	PCIe09_TX+	B66	GND	C66	PCIe01_RX+	D66	GND
A67	GND	B67	PCIe10_RX-	C67	GND	D67	PCIe02_TX-/SGMII1_TX-
A68	PCIe10_TX-	B68	PCIe10_RX+	C68	PCIe02_RX-/SGMII1_RX-	D68	PCIe02_TX+/SGMII1_TX+
A69	PCIe10_TX+	B69	GND	C69	PCIe02_RX+/SGMII1_RX+	D69	GND
A70	GND	B70	PCIe11_RX-	C70	GND	D70	PCIe03_TX-/SGMII0_TX-
A71	PCIe11_TX-	B71	PCIe11_RX+	C71	PCIe03_RX-/SGMII0_RX-	D71	PCIe03_TX+/SGMII0_TX+
A72	PCIe11_TX+	B72	GND	C72	PCIe03_RX+/SGMII0_RX+	D72	GND
Row A		Row B		Row C		Row D
A73	GND	B73	PCIe12_RX-	C73	GND	D73	PCIe04_TX-
A74	PCIe12_TX-	B74	PCIe12_RX+	C74	PCIe04_RX-	D74	PCIe04_TX+
A75	PCIe12_TX+	B75	GND	C75	PCIe04_RX+	D75	GND
A76	GND	B76	PCIe13_RX-	C76	GND	D76	PCIe05_TX-
A77	PCIe13_TX-	B77	PCIe13_RX+	C77	PCIe05_RX-	D77	PCIe05_TX+
A78	PCIe13_TX+	B78	GND	C78	PCIe05_RX+	D78	GND
A79	GND	B79	PCIe14_RX-	C79	GND	D79	PCIe06_TX-/SATA1_TX-
A80	PCIe14_TX-	B80	PCIe14_RX+	C80	PCIe06_RX-/SATA1_RX-	D80	PCIe06_TX+/SATA1_TX+
A81	PCIe14_TX+	B81	GND	C81	PCIe06_RX+/SATA1_RX+	D81	GND
A82	GND	B82	PCIe15_RX-	C82	GND	D82	PCIe07_TX-/SATA0_TX-
A83	PCIe15_TX-	B83	PCIe15_RX+	C83	PCIe07_RX-/SATA0_RX-	D83	PCIe07_TX+/SATA0_TX+
A84	PCIe15_TX+	B84	GND	C84	PCIe07_RX+/SATA0_RX+	D84	GND
A85	GND	B85	TEST#	C85	GND	D85	NBASET0_MDIO-
A86	VCC_RTC	B86	RSMRST_OUT#	C86	SMB_CLK	D86	NBASET0_MDIO+
A87	SUS_CLK	B87	UART1_TX	C87	SMB_DAT	D87	GND
A88	GPIO_00	B88	UART1_RX	C88	SMB_ALERT#	D88	NBASET0_MDI1-
A89	GPIO_01	B89	UART1_RTS#	C89	UART0_TX	D89	NBASET0_MDI1+
A90	GPIO_02	B90	UART1_CTS#	C90	UART0_RX	D90	GND
A91	GPIO_03	B91	I2C2_CLK/ETH_MDIO_CLK	C91	UART0_RTS#	D91	NBASET0_MDI2-
A92	GPIO_04	B92	I2C2_DAT/ETH_MDIO_DAT	C92	UART0_CTS#	D92	NBASET0_MDI2+
A93	GPIO_05	B93	GP_SPI_MOSI	C93	I2C0_CLK	D93	GND
A94	GPIO_06	B94	GP_SPI_MISO	C94	I2C0_DAT	D94	NBASET0_MDI3-
A95	GPIO_07	B95	GP_SPI_CS0#	C95	I2C0_ALERT#	D95	NBASET0_MDI3+
A96	GPIO_08	B96	GP_SPI_CS1#	C96	I2C1_CLK	D96	GND
A97	GPIO_09	B97	GP_SPI_CS2#	C97	I2C1_DAT	D97	NBASET0_LINK_MAX#
A98	GPIO_10	B98	GP_SPI_CS3#	C98	NBASET0_SDP	D98	NBASET0_LINK_MID#
A99	GPIO_11	B99	GP_SPI_CLK	C99	NBASET0_CTREF	D99	NBASET0_LINK_ACT#
A100	PINOUT_TYPE0	B100	GP_SPI_ALERT#	C100	PINOUT_TYPE1	D100	PINOUT_TYPE2

![The image shows a square icon with a thick red border. Inside, there is a white shape resembling a document with a folded top-right corner. Two horizontal red lines are centered within the shape. There is no text in the image.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/a2104f034b41bcb6a3059fa8d28562312de1e20e0f3674957dcb604c93948747.jpg) Note: SATA, SNDW, GP\_SPI are optional feature and also depends on module’s specifications ![The image shows a graphic icon of a document or file. It features a thick red outline forming a rectangular shape with a folded bottom-right corner. Inside the outline, two horizontal red lines are centered vertically, representing text lines. The background within the red border is white.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/4bb5a75ee89058ef8b803d5cf27377781e7446fe856adafc2c51ec7861527a74.jpg) Note: ESPI\_CS1 pin need be enabled at module’s BIOS setting. Super I/O works if the ESPI\_CS1 enabled The example below illustrates the interface or usage of each connectors/jumper. # PCle 16-31: Group 1 Lanes 16:31 assigned PClex16 Slot slikscreen interface from module or IC on carrier more information # 5.5. PCIe x8 Slot PCIE8-15: Lanes 8-15 assigned to the PCIex8 slot, supporting speeds up to Gen5. The slot is open-ended and supports x8 or x4 configuration, for example one x8 or two x4, depending on the PCIe root port configuration. The speed and configuration are dependent on the module specifications. An additional PCIe lane-splitting add-on is required to validate two x4 signal configurations. ![Pure electrical circuit lines without any symbols](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/4ad4f4ec996fd7ba904970045b02aa18c903ae2bfadb7cc31b81bb0b4e8cecd1.jpg)

Pin	Signal	Pin	Signal
B1	+ 12V	A1	PRSNT
B2	+ 12V	A2	+ 12V
B3	+ 12V	A3	+ 12V
B4	GND	A4	GND
B5	SMB_CLK	A5	JTAG
B6	SMB_DAT	A6	JTAG
B7	GND	A7	JTAG
B8	+3.3V	A8	JTAG
B9	JTAG	A9	+ 3.3V
B10	+ 3.3VAUX	A10	+ 3.3V
B11	WAKE#	A11	PERST#
B12	RSVD	A12	GND

Pin	Signal	Pin	Signal
B22	GND	A22	PERn1
B23	PETp2	A23	GND
B24	PETn2	A24	GND
B25	GND	A25	PERp2
B26	GND	A26	PERn2
B27	PETp3	A27	GND
B28	PETn3	A28	GND
B29	GND	A29	PERp3
B30	RSVD	A30	PERn3
B31	PRSNT	A31	GND
B32	GND	A32	RSVD
B33	PETp4	A33	RSVD

Pin	Signal	Pin	Signal
B43	GND	A43	PERp6
B44	GND	A44	PERn6
B45	PETp7	A45	GND
B46	PETn7	A46	GND
B47	GND	A47	PERp7
B48	PRSNT	A48	PERn7
B49	GND	A49	GND
B50	PETp8	A50	RSVD




B13	GND	A13	REFCLK+
B14	PETp0	A14	REFCLK-
B15	PETn0	A15	GND
B16	GND	A16	PERp0
B17	PRSNT	A17	PERn0
Pin	Signal	Pin	Signal
B18	GND	A18	GND
B19	PETp1	A19	RSVD
B20	PETn1	A20	GND
B21	GND	A21	PERp1

B34	PETn4	A34	GND
B35	GND	A35	PERp4
B36	GND	A36	PERn4
B37	PETp5	A37	GND
B38	PETn5	A38	GND
Pin	Signal	Pin	Signal
B39	GND	A39	PERp5
B40	GND	A40	PERn5
B41	PETp6	A41	GND
B42	PETn6	A42	GND

# 5.6. PCIe x4 Slot PCIE0-3: Lanes 0:3 assigned PCIex4 slot

Pin	Signal	Pin	Signal
B1	+12V	A1	PRSNT
B2	+12V	A2	+12V
B3	+12V	A3	+12V
B4	GND	A4	GND
B5	SMB_CLK	A5	JTAG
B6	SMB_DAT	A6	JTAG
B7	GND	A7	JTAG
B8	+3.3V	A8	JTAG
Pin	Signal	Pin	Signal
B9	JTAG	A9	+3.3V
B10	+3.3VAUX	A10	+3.3V
B11	WAKE	A11	PERST#

![The image shows a horizontal, rectangular grey hardware component, resembling a server chassis panel or backplane. It features two long, black horizontal strips running across the center, each containing a repeating pattern of vertical slats or vents. On the far left edge, a small grey latch protrudes, while on the far right edge, there is a small circular indentation. Along the bottom edge, several small, faint circular markings or screws are visible.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/4c457ada51dbec9ecf3aa2d0393f24fcdbff64dc0168aa9f3ea03f91baa3b19a.jpg)

Pin	Signal	Pin	Signal
B12	RSVD	A12	GND
B13	GND	A13	REFCLK+
B14	PETp0	A14	REFCLK-
B15	PETn0	A15	GND
B16	GND	A16	PERp0
B17	PRSNT	A17	PERn0
B18	GND	A18	GND
B19	PETp1	A19	RSVD
Pin	Signal	Pin	Signal
B20	PETn1	A20	GND
B21	GND	A21	PERp1
B22	GND	A22	PERn1

Pin	Signal	Pin	Signal
B23	PETp2	A23	GND
B24	PETn2	A24	GND
B25	GND	A25	PERp2
B26	GND	A26	PERn2
B27	PETp3	A27	GND
B28	PETn3	A28	GND
B29	GND	A29	PERp3
B30	RSVD	A30	PERn3
Pin	Signal	Pin	Signal
B31	PRSNT	A31	GND
B32	GND	A32	RSVD

# 5.7. M.2 M-KEY M.2 Key-M: Lanes 4-7 assigned M.2 slot Up to 22110 M.2 dimension ![This image displays a vertical rectangular graphic, resembling a label. On the left, a dark grey background features the text 'M.2' in large, white, italicized sans-serif font. To the right, a narrower vertical strip has a white background with a repeating pattern of small, vertical black dashes.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/503579bfe2c3560bc14f9f86d52412474b175b469e178290fde919d8b63634d5.jpg)

Pin	Signal	Pin	Signal
1	CONFIG	2	+3.3V
3	GND	4	+3.3V
5	PERn3	6	N.C
7	PERp3	8	N.C
9	GND	10	DAS/DSS#
11	PETn3	12	+3.3V
13	PETp3	14	+3.3V
15	GND	16	+3.3V
17	PERn2	18	+3.3V
19	PERp2	20	N.C
21	CONFIG	22	N.C
23	PETn2	24	N.C

Pin	Signal	Pin	Signal
25	PETp2	26	N.C
27	GND	28	N.C
29	PERn1	30	N.C
31	PERp1	32	N.C
33	GND	34	N.C
35	PETn1	36	N.C
37	PETp1	38	DEVSLP
39	GND	40	N.C
41	PERn0	42	N.C
43	PERp0	44	N.C
45	GND	46	N.C
47	PETn0	48	N.C

Pin	Signal	Pin	Signal
49	PETp0	50	PETST#
51	GND	52	CLKREQ#
53	REFCLKN	54	PEWAKE#
55	REFCLKP	56	N.C
57	GND	58	N.C

67	N.C	68	SUSCLK
69	CONFIG	70	+3.3V
71	GND	72	+3.3V
73	GND	74	+3.3V
75	CONFIG

# 5.8. DisplayPort DP connector at Rear I/O • DP\_DDI0: DDI0 channel assigned. DDI0 consist of SS 0-1 high speed signals and its relative sideband signals DP++ function depends on the module specifications # 5.9. eDP EDP\_DSI: 4 lanes eDP signal assigned 40-pin connectors DSI not supported ![The image displays a horizontal, cylindrical object colored primarily yellow with darker orange caps at the left and right ends. It is outlined with black lines. Inside the yellow section, there are horizontal black lines running near the top and bottom edges, and vertical black lines separating the yellow section from the end caps. The entire object is framed by thin black horizontal lines at the very top and bottom.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/dd88e31f66c1b1fadb496f31db5dc3207b3f1d8cbe06ed356ea0b9919d556941.jpg)

Pin	Signal	Pin	Signal
1	N.C	2	BKL_PWR
3	BKL_PWR	4	BKL_PWR
5	BKL_PWR	6	N.C
7	N.C	8	BKL_CTRL
9	BKL_ENABLE	10	GND
11	GND	12	GND
13	GND	14	HPD
15	GND	16	GND
17	GND	18	GND
19	N.C	20	Panel_PWR
21	Panel_PWR	22	Panel_PWR
23	Panel_PWR	24	GND

Pin	Signal	Pin	Signal
25	AUX_N	26	AUX_P
27	GND	28	eDP_LANE0_P
29	eDP_LANE0_N	30	GND
31	eDP_LANE1_P	32	eDP_LANE1_N
33	GND	34	eDP_LANE2_P
35	eDP_LANE2_N	36	GND
37	eDP_LANE3_P	38	eDP_LANE3_N
39	GND	40	N.C

![The image displays a red icon resembling a document or a note. It is a square shape with a white interior and a red outline. The bottom-right corner is folded inward (a page curl effect) and is colored red. Inside the white space, there are two horizontal red lines centered horizontally.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/61b0ab469d0e707812cff2c51236bc645b3d4a1c03c81245d5a90b095639e90f.jpg) Note: BKL\_PWR (backlight power) defaults to 5V, and Panel\_PWR defaults to 3.3V. Both can be adjusted using JP28, JP29, as shown in the table below. # PANEL\_PWR: power for eDP panel 6-pin head

Pin	Signal	Pin	Signal
1	+3.3V	2	+3.3V
3	+3.3V	4	+3.3V
5	GND	6	GND

![The image displays a vertical stack of three rounded rectangular shapes resembling buttons on a remote control. The top two shapes each contain two small, empty square outlines side-by-side. The bottom shape contains a small, empty square outline on the left and a larger, solid black square on the right.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/24cc836850de21780630ff5f22f7525afe756720f48fb9a2b206952910f50218.jpg) # JP28: panel power setting

Jumper	Status
1-2	3.3V (default)
2-3	5V

# JP29: backlight power setting

Jumper	Status
1-2	12V
2-3	5V (default)

# 5.10. Audio HDA Audio\_HDA: HDA assigned at Rear I/O 3-in-1 audio jack

Color	Signal
BLUE	LINE-IN
GREEN	LINE-OUT
PINK	MIC-IN

![The image displays a vertical grey rectangular panel containing three circular lights arranged in a column. The top light is a light blue ring with a black center. The middle light is a light green ring with a black center. The bottom light is a light pink ring with a black center. There is no text visible in the image.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/ea3542d1b70cb4974283bc86f2a7ef8fe3aaee1023cc650da29e0e73fe8c9b3d.jpg) # 5.11. Audio SNDW SNDW0: SNDW0 signal assigned SNDW1: SNDW1 signal assigned SNDW2: SNDW2 signal assigned SNDW3: SNDW3 signal assigned ![The image displays a simple line drawing of a rectangular input field. Inside the rectangle, there is a small square symbol on the left, followed by five hollow circles spaced out horizontally to the right.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/6ebfa8789fd8e7287088c0effe11fbde475b2590db156f85832ac6aca0937338.jpg) SNDW function is not enabled. The readiness of SNDW devices and drivers are low.

Pin	Signal	Pin	Signal
1	+5V	2	+3.3V
3	+1.8V	4	SNDW_CLK
5	SNDW_DATA	6	GND

# 5.12. Ethernet NBASE-T 2-in-1 Ethernet Connector at Rear I/O ETH\_0: NBASET\_0 assigned (upper one) ETH\_1: NBASET\_1 assigned (lower one) Up to 10GbE, depending on the module specifications ![The diagram features a central vertical rectangular device, resembling a network switch, containing two black RJ45 ports stacked vertically.\n\n**Labeled Blocks:**\n* **Left:** Text reading 'Link Speed'.\n* **Center:** A grey device with two black ports. Above the top port and below the bottom port are indicator lights: a green triangle on the left and an orange rectangle on the right for each section.\n* **Right:** Text reading 'Link Status & Activity'.\n\n**Connections:**\n* **Green Lines:** Two green lines connect the 'Link Speed' text to the green indicator lights on the left side of the central device.\n* **Yellow Lines:** Two yellow lines connect the 'Link Status & Activity' text to the orange indicator lights on the right side of the central device.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/bd7619cbf39200d60a776b455b75267b2d76450349385807acf1867179ff5b07.jpg)

LED Function	LED Color	LED State	Description
Status & Activity	Orange	Off	No Link
		Steady On	Link established, no activity detected
		Blinking	Link established, activity detected
Speed	Green/Orange	Off	10M
		Green	100M/1G link speed
		Orange	Max. link speed(2.5GbE based on current existing module specification)

# 5.13. USB USB Type-A / Type-C Combo connector at Rear I/O • USBA\_SS6: 1x USB3.x/2.0 assigned, Type-A connector, up to 10Gbit/s • USBC\_SS2&3: USB4\_0 (USB4 port 0) assigned, Type-C connector, USB4 capable ![The image displays a vertical illustration of a piece of electronic equipment, resembling a reel-to-reel tape recorder. The top section features a dark grey panel with a bright blue horizontal bar, likely representing a VU meter or tape counter, situated above two thin horizontal lines. The main body is light grey. The bottom section contains a window revealing a tape mechanism, depicted as a black shape with a white strip of tape wrapped around it, marked by small blue rectangles. The entire object is outlined in black with a flat, digital art style.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/d6e5363ef0fcd229d2eca5f2c4ecf19efae9537be4d70d676f2572d047d5723d.jpg) USBA\_SS6 consists of SS lane 6 (USB3.x SSTX/RX pairs, sometimes called as USB3.x port 1), USB3 (USB2.0 D+/D- from port 3) USBC\_SS2&3 consists of SS lane 2-3 (SSTX/RX pairs, sometimes called as USB4 port 0), USB0 (USB2.0 D+/D- from port 0) and sidebands USB4 at Type-C depends on module specification (HW/BIOS configuration) USB Type-A / Type-C Combo connector at Rear I/O • USBA\_SS7: 1x USB3.x/2.0 assigned, Type-A connector, up to 10Gbit/s • USBC\_SS4&5: USB4\_1 (USB4 port 1) assigned, Type-C connector, USB4 capable ![This image displays a vertical, rectangular icon resembling a computer tower or hardware device. The top section features a dark grey border enclosing a light grey interior. Inside this upper area, a bright blue horizontal bar is positioned near the top edge, with three small, light blue horizontal dashes situated below it. The bottom section consists of a separate rectangular area with a thick dark grey border, containing a horizontal row of dashes or a segmented bar in light grey, resembling a floppy disk drive slot.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/ce44bd9bd46d9763be041fafc827a133c50b7ebf4886e07158db458c545e4ad6.jpg) USBA\_SS7 consists of SS lane 7 (USB3.x SSTX/RX pairs, sometimes called as USB3.x port 0), USB5 (USB2.0 D+/D- from port 5) USBC\_SS4&5 consists of SS lane 4-5 (SSTX/RX pairs, sometimes called as USB4 port 1), USB1 (USB2.0 D+/D- from port 1) and sidebands USB4 at Type-C depends on module specification (HW/BIOS configuration) USB Type-A 2-in-1 connector at Rear I/O • USB\_2: USB2 (USB2.0 port 2) assigned, Type-A connector, up to USB2.0 speed • USB\_4: USB4 (USB2.0 port 4) assigned, Type-A connector, up to USB2.0 speed ![The image displays a vertical stack of two identical horizontal rectangular shapes against a grey background. Each shape is outlined in black and contains a dark horizontal band near the top. Below this band, three small, light blue rectangular shapes are arranged in a row. There is no text in the image.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/45bcd74acdbac9189b381c8c70a2b871a885e77fa8a3a6649e2e8983ae8d6561.jpg) F\_2XUSB\_2.0: 2x USB2.0 from USB6 and USB7 (USB2.0 port 6 and port 7) Front panel usage, 9-pin, 2.54 mm pitch

Pin	Signal	Pin	Signal
1	+5V	2	+5V
3	USB7_N	4	USB6_N
5	USB7_P	6	USB6_P
7	GND	8	GND
9	GND

![The image displays a horizontal row of black capital letter 'B' characters against a white background. There are four complete 'B's visible, followed by a fifth 'B' that is partially cut off on the right edge.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/e53748a76561c8cd769cb5015ab435ce1cdaf17730ca8fe13f127e474875a32e.jpg) # 5.14. GPIO GPIO: GPIO 0-11 signal assigned 14-pin, 2.54mm pitch

Pin	Signal	Pin	Signal
1	1.8V	2	GPIO_06
3	GPIO_00	4	GPIO_07
5	GPIO_01	6	GPIO_08
7	GPIO_02	8	GPIO_09
9	GPIO_03	10	GPIO_10
11	GPIO_04	12	GPIO_11
13	GPIO_05	14	GND

![The image shows a horizontal row of eight identical black shapes against a white background. Each shape is a vertically oriented rounded rectangle (or capsule). Inside each black shape are three small white dots arranged in a vertical column. The shapes are separated by thin white gaps. A thick black horizontal bar runs across the very top edge of the image.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/c9b68a71fb219d8bf19cbc91d7964d1d8241a079d8966ed320609b631f209f5f.jpg) # 5.15. I2C I2C0: I2C0 bus assigned, 4-pin, 2.54mm pitch I2C1: I2C1 bus assigned, 4-pin, 2.54mm pitch

Pin	Signal	Pin	Signal
1	+1.8V	2	I2C_DATA
3	I2C_CLK	4	GND

![The image displays a black, horizontal, pill-shaped object (a rectangle with fully rounded ends) centered on a white background. Inside the black shape, there are four small white dots arranged in a horizontal row.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/7930d011db4a68d70296ec598d64c5069c7b0e00d52299d0f327bd6a378d9a5f.jpg) # 5.16. UART / COM COM1\_SER0: UART0 signal assigned, 2.0mm pitch COM2\_SER1: UART1 signal assigned, 2.0mm pitch

Pin	Signal	Pin	Signal
1	N.C	2	N.C
3	UART_RX	4	UART_RTS
5	UART_TX	6	UART_CTS
7	N.C	8	N.C
9	GND	10	N.C

![The image displays a black rectangle with a thin white border. Inside the black area, there are twelve white dots arranged in three rows and four columns. A small sliver of white is visible along the very top edge.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/75f7d8bc0cfb42c948e45a7504ff878b09db9dc75ea2f1b49b174bc139d23eed.jpg) COM3: UART from Super I/O signal assigned, 2.0mm pitch COM4: UART from Super I/O signal assigned, 2.0mm pitch

Pin	Signal	Pin	Signal
1	DCD	2	DSR
3	RX	4	RTS
5	TX	6	CTS
7	DTR	8	RI
9	GND	10	N.C

![The image displays a black rectangular area surrounded by a white border. Inside the black area, near the top, is a thin white horizontal rectangle. Below this rectangle, there are two rows of six white circular dots each, arranged in a grid pattern.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/68f67373a044145919bbe4d6d300f396748b8320b561b29c9ef436fcf4965b16.jpg) MODE0/MODE1: selection of RS232/RS485/RS422 mode for COM3

Mode	MODE1	MODE0
RS232 (default)	2-3	1-2
RS485	1-2	2-3
RS422	1-2	1-2

![The image displays a close-up of a remote control interface. On the left, there is a light gray section with rounded corners containing a white square icon (a square outline with a smaller square inside). To the right, a black section contains three white icons arranged horizontally: a double left-pointing arrow (rewind), a single right-pointing triangle (play), and a double right-pointing arrow (fast forward).](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/dd070a1a2dd0aaf144ec48ce09bcd2ba97290d3097c96eaa223631bf818a195c.jpg) # 5.17. eSPI Debug Connector ESPI: for eSPI debugging connection purpose

Pin	Signal	Pin	Signal
1	eSPI_CLK	2	GND
3	eSPI_CS0	4	N.C
5	CB_RST	6	+5V
7	eSPI_IO_3	8	eSPI_IO_2
9	+ 3.3VSB	10	eSPI_IO_1
11	eSPI_IO_0	12	eSPI_ALERT0#
13	SMB_CK	14	SMB_DAT
15	+1.8VSB	16	eSPI_CS1
17	eSPI_RST#	18	N.C
19	+5V	20	eSPI_ALEART1#

![The image displays a vertical column of ten identical, light-grey rounded rectangles stacked one above the other. Each rectangle contains two smaller, vertically aligned squares inside it. In the first nine rectangles from the top, both squares are empty (white). In the bottommost rectangle, the top square is empty, while the bottom square is filled with solid black.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/dc0b329a344f5624280c3a58c6f371ef785370e2104b2181d4905089ee33b41f.jpg) # 5.18. SMB SMBUS: SMBus assigned, 4-pin, 2.54mm pitch

Pin	Signal	Pin	Signal
1	+1.8V	2	SMB_DATA
3	SMB_CLK	4	GND

![The image displays a black, horizontally oriented pill-shaped rectangle with rounded corners set against a white background. Inside the black shape, there are four small white dots arranged in an evenly spaced horizontal row.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/7966570c3482f0fa4dc11c1a36cad7633a5cbad57b6bb62b1aa114fc397ed051.jpg) # 5.19. FAN Connector 2nd\_FAN (or named as MODULE\_FAN): Secondary FAN control signals from module assigned, 4-pin It can be used for module FAN control or can be used for system Fan control. The FAN table is stored in the module’s EC controller, and the default FAN table is configured for module FAN usage. Refer to the module’s user manual for detail.

Pin	Signal
1	GND
2	+12V_5V_FAN
3	SENSE_FAN
4	PWMOUT_FAN

![This is a black and white line drawing of a vertical rectangle. Inside the rectangle, a vertical line divides the space into a left and right section. The left section contains a tall rectangular shape with a smaller rectangular shape inside it near the top. The right section contains a column of four small squares stacked vertically.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/6466d177218dc7e634f7cbe22318eae4f49679bceb61c28ce1d1014f1f971b66.jpg) SYS\_FAN0: FAN control signals from Super I/O assigned, 4-pin ESPI\_CS1 need be enabled at module’s BIOS setting to make Super I/O works

Pin	Signal
1	GND
2	+12V_5V_FAN0
3	SENSE_FAN0
4	PWMOUT_FAN0

![The image is a black-and-white line drawing of a rectangular object, likely a schematic or diagram. It is divided vertically into sections. On the far left, there is a narrow vertical strip. Next to it, a section contains a horizontal rectangle near the top. To the right, a larger vertical section contains a column of four squares: a square at the very top, followed by three smaller squares stacked vertically below it.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/ddadcdb466fb1d9efea4a0f8b55e5793e11c3d232f442f23159f1f2371e832d2.jpg) SYS\_FAN1: FAN control signals from Super I/O assigned, 4-pin ESPI\_CS1 need be enabled at module’s BIOS setting to make Super I/O works

Pin	Signal
1	GND
2	+12V_5V_FAN1
3	SENSE_FAN1
4	PWMOUT_FAN1

![The image is a simple black-and-white line drawing containing no text. It depicts a vertical rectangular structure divided into sections. On the left, there is a vertical strip next to a rectangular area containing a horizontal rectangle. To the right, a tall column features four small squares stacked vertically; the top square is filled with solid black, while the three squares beneath it are empty white squares with black outlines.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/03d35b66108d6aef8fe409358f43ef9f072c24382757559ba409eea7dc154483.jpg) # 5.20. Carrier BIOS A SPI BIOS Socket on carrier board • Allow boot-up from the carrier with proper jumper settings. ![A black and white line drawing of a mechanical retaining ring, commonly known as a snap ring. The ring is oriented horizontally with a central, solid black curved body connecting two outer ends. The left and right ends are depicted as rectangular sections filled with vertical parallel lines, resembling serrated teeth. A vertical line runs down the center of the black body.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/7b4209713a1d2f4ff1c82a2aa36843f8e99918f3e546bd6df357244d2812cd15.jpg) BSEL0/BSEL1/BSEL2: Jumpers for module boot-up selection

BESL2	BSEL1	BSEL0	BIOS Boot Select
1-2	1-2	1-2	Module SPI0/SPI1 (default)
1-2	1-2	2-3	Carrier SPI0/Module SPI1
1-2	2-3	1-2	Module SPI0/Carrier SPI1

![The image displays a vertical, rectangular graphic with a rounded bottom. The upper two-thirds of the shape are black and contain two small white dots arranged vertically. The bottom third is light gray and features a small black square with a white dot in the center. The overall design resembles a minimalist face or a battery icon.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/bf80b62b60af80e9d31bf0a97eb28874ac3cb63801e360631a70e5f2ed203568.jpg) Note: Boot from Carrier SPI BIOS ROM will require specific BIOS firmware. The SPI ROM inside the socket is without any firmware # 5.21. Front Panel Control F\_MISC: Power Button, Reset Button, HDD LED, Power LED for front panel header

Pin	Signal	Pin	Signal
19	N.C	20	N.C
17	N.C	18	BUZZER
15	N.C	16	N.C
13	GND	14	N.C
11	+5VSB	12	+5V
9	N.C	10	N.C
7	SYS_RESET#	8	GND
5	GND	6	PWR_BTN#
3	HDD_LED_N	4	GND
1	HDD_LED_P	2	+5V

![The image shows a grid of twelve checkboxes arranged in two columns and six rows. The bottom checkbox in the left column is checked, indicated by a small black square inside it. All other eleven checkboxes are empty.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/20dee7f8201e024f1c17e821af136b6c52a3a67f23208c9231164d942af6305d.jpg) # 5.22. Other Jumpers JP5: clear CMOS. To clear CMOS, shut down the power and short pin 2 and pin 3 (short VBAT to ground)

Jumper	Clear CMOS
1-2	Normal (default)
2-3	Clear CMOS

![The image displays a stylized, vertical graphic resembling a simplified face or battery icon. It is a rounded rectangle divided horizontally into two sections. The upper section is black and contains two small white squares arranged vertically. The lower section is light grey and contains a single white square centered within it.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/66fb7d52a8a4f476d3cf245f44f931e3bcbaa65a97e3c5462f30f085564bcc7f.jpg) JP3: Selection of Super I/O address

Jumper	Selection of Super I/O address
1-2	4Eh
2-3	2Eh (default)

![The image displays a vertical rectangular graphic divided into two distinct sections. The upper section is black and features three small white squares arranged vertically in a column. The lower section is a light gray or off-white rounded rectangle containing a single small black square centered at the bottom.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/d2ee71d9c7c215141f3c35cc8d11a375e593606f2169f8890d839094c3787a41.jpg) JP45: Module Type detection

Jumper	Status
1-2	Detect (default)
2-3	Undetect

![The image displays a vertical, capsule-shaped object. The upper section is black and contains two small white squares stacked vertically. The lower section is light grey and contains a single white square centered horizontally.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/dac32a793b8c790239494cf2c0b5ea77214b95e04f45dabf6bc4f1c18a16c931.jpg) The functionality of Module Type detection requires the carrier board to implement combinatorial logic that monitors the module TYPE pins and keeps the power off if an incompatible module pinout type is detected. # 5.23. Power Connectors The COM-HPC Mini module requires only a single power rail input and does not need a standby power rail, as defined by the PICMG specification. To make power sourcing more convenient and straightforward, the power connectors are designed based on the ATX power style and require only the main power rail. # ATX\_24: 24-Pin Power Connector Connect the ATX 24-pin (or 20-pin) connector to supply power to the COM-HPC Mini Base-ATX carrier and the COM-HPC Mini module.

Pin	Signal	Pin	Signal
1	+3.3V (not used)	13	+3.3V (not used)
2	+3.3V (not used)	14	-12V (not used)
3	GND	15	GND
4	+5V (not used)	16	PWR_ON
5	GND	17	GND
6	+5V (not used)	18	GND
7	GND	19	GND
8	PWR_GOOD	20	-5V (not used)
9	+5VSB (not used)	21	+5V (not used)
10	+12V	22	+5V (not used)
11	+12V	23	+5V (not used)

![Simple line drawing of a door with multiple compartments and a door handle (no text or symbols)](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/d088f05a3f3bc63e82b7349753d6d06e409d2e2dbb2f78703a3993fefb0882e4.jpg)

+3.3V (not used)

GND

3.3V, 5V, 5VSB are not used even although it is connected In addition, specific logic design on the carrier board will always ensure that PWR\_ON and PWR\_GOOD are enabled. # ATX\_4: 4-Pin Power Connector Connect the ATX 12V 4-pin connector to supply power to the COM-HPC Mini Base-ATX carrier and the COM-HPC Mini module

Pin	Signal
1	GND
2	GND
3	+12V
4	+12V

![The image displays a black-and-white line drawing of a rectangular layout, likely a floor plan. It is divided into four quadrants by a central vertical line and a central horizontal line.\n\n* **Left Side:** The left column consists of two identical squares stacked vertically.\n* **Right Side:** The right column consists of two squares stacked vertically. Each square contains a quarter-circle arc in the corner adjacent to the central dividing line (the top square has the arc in the bottom-left corner, and the bottom square has it in the top-left corner).\n* **Right Edge:** There is a small rectangular protrusion or tab extending from the right edge, positioned between the upper and lower right squares.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/ca29ff0edca550621ff5c2170adf36faec2c0aba90720f0e19bf88563411c9f8.jpg) JP1: selection of AT source

Jumper	Module 5VSBY SOURCE
3-4	AT mode from PSU (default)
1-2	AT mode from Smart Battery (default)

![The image displays a horizontal rectangular graphic divided into two sections. The left section is black and contains two small white squares arranged side-by-side. The right section is light grey, has a rounded right edge, and contains two small white squares arranged side-by-side. There is no text visible in the image.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/6f9a80c57d5f928513db1641f60374c19a958e1567bdefb27f5944680b9abce9.jpg) ![A red outline icon depicting a document or page with a curled top-right corner. Inside the document shape, there are two horizontal red lines representing text.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/7dccef72aef626ded878171970befe3a5255047773e993afdf3adc6c8e771b58.jpg) Note: JP1 is for the ATX power source. JP1 sets PS\_ON enabled at all times. It is recommended to keep the default jumper setting unchanged. # 6. Carrier BIOS The COM-HPC Mini Base-ATX supports a Carrier BIOS, using the Boot Serial Peripheral Interface (SPI) for COM-HPC modules. Secondary BIOS solutions can be used as an alternative to the on-module BIOS and provide support for the following: • Testing new BIOS versions • Development of firmware modifications Recovery, in case the soldered BIOS on the module is corrupted (optional) To use the BIOS on the module: short pins 1-2 on BESL2, BESL1, BESL0; reference section 5.20 To use the BIOS on the carrier board: short pins 2-3 on BESL0, and keep pin 1-2 on BESL2, BESL1; reference section 5.20 Make sure that the secondary BIOS flash chip is properly installed into the Carrier BIOS socket before adjusting the BOOT BIOS selection. ![BSEL0\nBSEL2\nSYS_FAN1 MODULE_FAN\nBattery\nJP5\nJP48\nJP47\nI/O status indicators\n-2 Enable\n-2-3 Disable\nJP48 RTC discharge\n-2 Short\n-2-3 Open\nCarrier_BIOS](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/b47363bad9a7c45a451f2c6d93811e6d093c366c5fc3962bb4671087bf184e09.jpg) ![The image displays a red icon resembling a document or note with a folded bottom-right corner. Inside the white interior, there are two horizontal red lines stacked vertically.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/81cd550147f76da6c3a50b2d7e7838b3fdc3cba0555644d440b58bc92b816989.jpg) Note: Booting from the Carrier SPI BIOS ROM requires specific BIOS firmware. The SPI ROM inside the socket does not contain any firmware by default. # 7. Switches, POST, and LEDs # 7.1. Control Switches

Button	Description
PWR_BTN	Power Button
RST_BTN	Reset Button
SLP_BTN	Sleep Button
LID_BTN	Lid Button

Both the SLP and LID buttons support COM-HPC modules for ACPI power management behavior setting in an OS environment. (functionality also depends on the module specifications, especially the module’s BIOS configuration). # 7.2. Post Display and LEDs An I2C-based POST display is added for debugging. The two 7-SEG LEDs show the actual POST data. A row of mini-LEDs near the POST display indicates the following:

LED	Description
5VSB	24+4-pin power attached on standby or active (no function)
S3	Indicates S3 status
PWR_ON	Indicates power on
HDD	Indicates hard drive activity (at M.2 M-key)
WDT	Indicates WDT (watchdog timer) activity

![SYSB\nS3\nPWR_ON\nHDD\nWDT\nF_MISC\nPWR_BTN\n10\n8.0\n8.0](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/b5df4f69e90803eb1ab33ecb861d33152908b25170d108e23e42340b015e0112.jpg) # 8. Power Input Connection COM-HPC mini module only requires single power rail input, check section 5.23 as reference # 8.1. 12V Power Input at 24+4 Pin Power Connectors For the standard 12V power input usage: This is used to connect an ATX power supply that provides only the 12V power rail. It supplies 12V to the COM-HPC Mini module. The system will not power on unless the 4-pin connector is connected. Power components on the carrier board convert the 12V input to other required power rails for carrier board operation (the carrier uses both 12V and other generated power rails). ![Feed 12V\nATX_24\nATX_4\nJP41\nJP31\nMODULE_FAN](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/67d7cffbf7c3f512ce6930bf5e76609b0187a40f7f59e019ac4cd77268ba24c2.jpg) ![The image displays a red icon on a white background. The icon resembles a square piece of paper or a document with a folded top-right corner. Inside the shape, there are two horizontal red lines centered vertically, resembling a block of text.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/9a896bdafefe735514eaed20b63d2e22e0bc898da1d818213d960ab0ff2ad891.jpg) Note: Always powers on by default. It means the system will automatically power on once the mechanical switch of the power supply is switchedon. # 8.2. 8-20V Power Input at 4-Pin Power Connectors Connecting a single rail (8–20V) power source to the 4-pin connector is required. It will supply 8-20V to the COM-HPC Mini module. Power components located on the carrier board convert this voltage to other power rails needed for carrier board operation. The carrier board supports single-rail wide-range DC power input (8–20V) through a standard 4-pin ATX-style power connector. ![Wide Range Power Input\nno connection\nATX_24\nATX_4\nJ346\nJ346\nJ346\nMODULE_FAN](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/400a01797f4d93bb720a2eead53e01f296d033d403b745ecd68cf0cdbcf524fc.jpg) ![The image displays a red icon resembling a document or file. It features a square outline with a folded bottom-right corner. Inside the shape, there are three horizontal red lines stacked vertically, representing text or a list.](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/8e767e6cf81df66513ea13dad7bf44648aa42b1874e75db0fa9ce3fe51fc95f2.jpg) Note: Only the +12V and GND pins are used — the +5V, +3.3V, and other ATX rails are not connected internally. This connector is repurposed to accept a wide-range DC input. [🔗 Link to the original document](.com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626/com-hpc-mini-base-atx-manual-50m-77110-1000-03-20250626.pdf)