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Description
Mini Base Board For Compute Module 4 For The Raspberry Pi CM4 Or Being Integrated Into End Products with PoE function, which can be used with all versions of CM4.
Note: Raspberry Pi Compute Module 4 Not Included in the packege
1: This model only supports a 5V fan and cannot work with the 12V fan. Please confirm the fan voltage before connecting.
2: The DSI Display Port is connecting the DSI0 interface of the CM4, and doesn't use the DSI1 display interface.
3: The Type C interface can be used for the power supply or USB SLAVE interface for burning the image.
4: In order to ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to burn the image.
5: It needs to use a 5V 2A power supply for CM4. Otherwise, problems such as automatic shutdown, frequency reduction, etc. may occur.
6: When using the M.2 interface, please use the matching screws. Using screws of other lengths may cause the CM4 core to be damaged by the screws.
7: The module doesn't have any protection circuit, please do not short-circuit the power supply.
8: USB2.0 is closed by default, if you need to open it, you need to add dtoverlay=dwc2,dr_mode=host in config.txt.
9.HDMI1 uses a flat cable output, if you need to use it, you can purchase an HDMI adapter.
10. This expansion board does not support the POE function.
Includes Onboard:
| No. | Component | Description |
| 1 | CM4 connector | Suitable for all versions of Compute Module 4 |
| 2 | DC power supply/programming interface | 5V/2.5A power supply also can be used as an eMMC programming interface |
| 3 | DISP Interface | MIPI DSI Display interface |
| 4 | FAN Interface | For connecting cooling fan, allows speed adjustment and measurement, only support 5V fan. |
| 5 | CAM Interface | Dual MIPI CSI camera interface |
| 6 | HDMI0 Interface | HDMI Interface，Support 4K 30fps output |
| 7 | USB 2.0 Interface | 2-channel USB 2.0 Interface, for connecting sorts of USB devices |
| 8 | Gigabit Ethernet | Gigabit Ethernet RJ45 connector, with 10 / 100 / 1000M network support |
| 9 | M.2 indicators | Indicating the operating status of the M.2 interface |
| 10 | ACT indicators | Raspberry Pi operating status indicator |
| 11 | PWR indicators | Raspberry Pi power indicator |
| 12 | BOOT selection | jumper shorted: CM4 would be booted from the USB-C interface jumper opened: CM4 would be booted from eMMC or Micro SD card |
| 13 | 40PIN GPIO Interface | Conveniently connect various HAT modules |
| 14 | Micro SD Card interface | For connecting a Micro SD card with a pre-burnt image (Lite variant ONLY). |
| 15 | HDMI1 interface | HDMI1 Interface，Support 4K 30fps output |
| 16 | USB 2.0 interface | Can be connected through an adapter |
| 17 | FE1.1S | USB HUB chip, expanding one USB port to 4x ports |
| 18 | M.2 Interface | Supports sorts of NVME SSD, or communication modules with PCIE M.2 KEY-M interface |
| 19 | RTC | Allows RTC-related functions like wakeup, shutdown, reboot, and more |
| 20 | RTC interrupt pin switch | PI-RUN: CM4 reboot on RTC interruption GN-EN: CM4 shutdown on RTC interruption D4: D4 pin is triggered on RTC interruption |
| 21 | EMC2301 | Fan controller, for speed adjustment/measurement |
| 22 | RTC Battery connector | Can be connected to CR1220 button battery |
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