Waveshare Nano Base Board (A) For Raspberry Pi Compute Module 4, 55 X 40 Mm

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

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

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

4. CSI interface
1 × MIPI CSI camera interface

5. USB2.0 interface
for connecting sorts of USB devices

6. 40PIN GPIO interface
suitable for connecting to various HAT modules

7. PWR indicator
CM4 power status

8. ACT indicator
CM4 working status

9. AMS1117-3.3

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 Micro SD card)