# COM-HPC Client Base

COM-HPC® Client Type Reference Carrier Board in ATX Form Factor

![Close-up of a black printed circuit board with various electronic components and connectors (no visible text or symbols)](.com-hpc-client-base-datasheet-20230518/b3f614531b9f8bfae24b548f41fa5ac78765ec6f16988877c495c66e0f392f4c.jpg)

Specifications

<table><tr><td>Core Module Interface</td><td>PICMG COM-HPC Revision 1.0Support Client Type modules in Size A, Size B, or Size C form factor</td></tr><tr><td>Dimensions</td><td>305 mm x 244 mm (ATX)</td></tr><tr><td>Expansion Buses</td><td>1x PCI Express x16 slot (PCIe lane 16-31)2x PCI Express x4 slot (PCIe lane 0-3, 12-15)3x PCI Express x1 slot (PCIe lane 5, 6, 7)1x PCI Express x4 M.2 M key connector (PCIe lane 8-11), 1x PCI Express x1 M.2 E key connector (PCIe lane 4)</td></tr><tr><td>POST LEDs</td><td>Onboard IO expander for BIOS POST code data on  $I^{2}C$  bus</td></tr><tr><td>Secondary BIOS</td><td>Onboard socket for secondary SPI flash</td></tr><tr><td>COM-HPC Connectors</td><td>2x 400-pin (10 mm height)</td></tr><tr><td>HDMI</td><td>HDMI connector on Rear I/O (DDI0)</td></tr><tr><td>DP</td><td>1x DP connector (DDI1) and 1x Vertical on Rear I/O (DDI2)</td></tr><tr><td>Flat Panel</td><td>40-pin header eDP/DSI</td></tr><tr><td>Audio</td><td>Mic/Line-in/Line-out on Rear I/O by TI codec on I2S bus</td></tr><tr><td>SATA</td><td>1x SATA (SATA0)</td></tr><tr><td>USB 4</td><td>2x USB4 at Type C on Rear I/O</td></tr><tr><td>USB 3.x</td><td>1x USB 3.x Type E2x USB 3.x Type A on Rear I/O (by hub)2x USB 3.x at 19-pin header for front panel (by hub)</td></tr><tr><td>USB 2.0</td><td>2x USB 2.0/1.1 Type A on Rear I/O1x USB 2.0 on M.2 key-E2x USB 2.0/1.1 at 9-pin header for front panel (by hub)1x USB 2.0 at 10-pin header fro front header audio (by hub)</td></tr><tr><td>General Purpose LAN</td><td>2500/1000/100/10BASE-T compatible RJ-45 on Rear I/O*</td></tr><tr><td>GPIO/SD</td><td>12-pin header GPIO</td></tr><tr><td>Serial Port</td><td>3x 10-pin header (from module)2x 10-pin header (from Super I/O)</td></tr></table>

Specifications

<table><tr><td>Fan</td><td>1x 4-pin fan connector (from module)2x 4-pin fan connector (from Super I/O)</td></tr><tr><td>MIPI-CSI</td><td>2x CSI connector (CSI0/CSI1)*</td></tr><tr><td>GP_SPI</td><td>1x 12-pin header*</td></tr><tr><td>Feature Connectors</td><td>Headers for SMBus, I2C0/1,Header for front panelJumpers for module signal controls</td></tr><tr><td>Miscellaneous</td><td>Power button, Reset button, Sleep button, Lid button, Status LEDs, and Buzzer</td></tr></table>

\* Note: Functions available are dependent on the COM-HPC module used.

Block diagram
![The diagram displays a block diagram of connections, separated by two vertical grey bars labeled **J1** and **J2**. The connections are described below by section.\n\n**Left Side (J1):**\n*   **DP / HDMI stacked**: Connected to **DDI0** and **DDI1**.\n*   **eDP/DSI**: Connected to **eDP/DSI**.\n*   **3-in-1 audio jack**: Connected to **Audio codec**.\n*   **Audio codec**: Connected to **I2S**.\n*   **Header**: Connected to **SNDW_0**.\n*   **Header**: Connected to **SNDW_1**.\n*   **PCle x4 slot**: Connected to **PCle 0-3**.\n*   **PCle x1 slot**: Connected to **PCle 5**.\n*   **PCle x1 slot**: Connected to **PCle 6**.\n*   **PCle x1 slot**: Connected to **PCle 7**.\n*   **M.2 M Key SSD**: Connected to **PCle 8-11**.\n*   **PCle x4 slot**: Connected to **PCle 12-15**.\n*   **System Fan**: Connected to **Super I/O**.\n*   **COM 3**: Connected via **RS-232 485/422** and **transceiver** to **Super I/O**.\n*   **COM 4**: Connected via **transceiver** to **Super I/O**.\n*   **Port 80 LED**: Connected to **Super I/O**.\n*   **Super I/O**: Connected to **eSPI** and then to a **Header**.\n*   **BIOS ROM Socket**: Connected to **BOOT_SPI** and then to a **Header**.\n*   **COM 1 Header**: Connected to **UART_0**.\n*   **COM 2 Header**: Connected to **UART_1**.\n*   **RTC BAT**: Connected to **Status LEDs**.\n*   **Module Fan**, **Audio header front panel**, and **MISC Header front panel**: Lines extend towards J1.\n\n**Right Side (J2):**\n*   **DP vertical**: Connected to **DDI_2**.\n*   **USB4_0** and **USB2_0**: Connect to **USB 3.2 Type A** and **USB 4/TBT 4 Type C** (stacked).\n*   **USB4_1** and **USB2_1**: Connect to **USB 3.2 Type A** and **USB 4/TBT 4 Type C** (stacked).\n*   **USB2_2**: Connects to **USB 3.2 Type E front panel**.\n*   **USB2_3**: Connects to **USB 3.2 Gen2 Hub**. This hub outputs lines labeled **USB3_2** and **USB3_3**.\n*   **USB2_4, 5**: Connects to **2x USB 2 Type A stacked**.\n*   **USB2_7**: Connects to **USB 2 Hub**.\n*   **USB 2 Hub**: Connects to **2-in-1 USB 2 Header front panel** and **Audio codec**.\n*   **USB 3.2 Gen2 Hub**: Connects to **2-in-1 USB 3.2 Header front panel** and **Audio header Front Panel**.\n*   **USB2_6**: Connects to **M.2 E Key WIFI/BT**.\n*   **PCIe 4**: Connects to **PCIe x16 2-slot space**, which outputs **PCIe 16-31**.\n*   **NBEST-T_0**: Connects to **2x RJ-45 stacked**, which outputs **NBASE-T_1**.\n*   **Camera**: Connects to **CSI_0**.\n*   **Camera**: Connects to **CSI_1**.\n*   **SATA_0**: Connects to **SATA**.\n*   **4x BTN**: Connects to **PWR, RST, LID, SLP**.\n*   **GP_SPI**: Connects to **Header**.\n*   **SMB**: Connects to **Header**.\n*   **I2C_1**: Connects to **Header**.\n*   **I2C_0**: Connects to **Header**.\n*   **GPIO**: Connects to **EEPROM**, which connects to **Headers** labeled **12x GPIO**.\n\n**Additional Connections:**\n*   **System Fan** (on the right side of **Super I/O**) connects to **Super I/O**.\n*   **Audio codec** (on the right side) connects to **USB 2 Hub**.](.com-hpc-client-base-datasheet-20230518/493b4cbace17a754dacfa1649b9e6b5a5c9fa5fa050cea5e9ed091de516ca4ce.jpg)
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