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