Mini Base Board (B) Designed for Raspberry Pi Compute Module 4

1. CM4 socket

   suitable for all variants of Compute Module 4

2. Power input/Programming

   5V/2.5A power supply, or used for eMMC burning

3. DISP

   MIPI DSI display port

4. FAN

   for connecting cooling fan, allows speed adjustment and measurement

5. CAM

   2x MIPI CSI camera ports

6. HDMI0 connector

   HDMI0 port, supports 4K 30fps output

7. USB 2.0 ports

   2x USB 2.0 ports, for connecting sorts of USB devices

8. Gigabit Ethernet connector

   Gigabit Ethernet RJ45 connector, with 10 / 100 / 1000M network support

9. M.2 indicator

   indicating the operating status of M.2 interface

10. ACT indicator

    indicating the operating status of Raspberry Pi

11. PWR indicator

    indicating the status of Raspberry Pi power supply

12. BOOT selection

    ON: CM4 would be booted from USB-C interface

    OFF: CM4 would be booted from eMMC or Micro SD card

13. 40PIN GPIO header
14. Micro SD card slot

    for connecting a Micro SD card with pre-burnt image (Lite variant ONLY)

15. HDMI1 FFC connector

    HDMI1 port, supports 4K 30fps output

16. USB 2.0 FFC connector

    can be connected through an adapter

17. FE1.1S

    USB HUB chip, expanding one USB port to 4x ports

18. M.2 slot

    supports sorts of NVME SSD, or communication modules with PCIE M.2 KEY-M interface

19. RTC chip

    allows RTC-related functions like wakeup, shutdown, reboot, and more

20. RTC interrupt selection

    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 holder

    supports CR1220 button cell

Package Content: 

1. CM4-IO-BASE-A x1
2. SSD mounting screw x1