Waveshare Nano Base Board (C) For Raspberry Pi Compute Module 4, Onboard 8MP Camera, 55 X 40mm

1. CM4 socket
suitable for all variants of Compute Module 4

2. Mini HDMI port
supports 4K 30fps output

3. DSI port
MIPI DSI display interface

4. USB2.0 port
for connecting sorts of USB devices

5. TF card slot
for connecting a TF card with pre-burnt image (Lite variant ONLY)

6. Power supply / Programming
5V power supply, or used for eMMC burning

7. 40PIN GPIO header
for connecting sorts of HATs

8. IMX219-D160 Camera
8MP, 160° FOV

9. User button
Connect to GPIO21

10. BOOT switch
ON: Switch USB to Type C interface, will enter download mode when powered on (configured as a large-capacity disk through RPI boot)
OFF: Switch USB to Type A interface, will not enter download mode when powered on (booted from eMMC or TF card)

11. ACK Indicator
CM4 working status

12. PWR Indicator
CM4 power status