Waveshare Compute Module IO Board Plus User Manual page 3

Compute Module IO Board Plus User Manual
14. Power port: 5V 2.5A
15. FE1.1S: USB HUB chip
16. 12MHz crystal
17. CP2102: USB TO UART converter
18. Micro SD card slot: insert a Micro SD
card with pre-burnt system, to start up
Compute Module 3 Lite
19. TLC1543: AD converter
20. DAC8552: 16-bit DAC, 2-ch
21. DS3231: high-precision RTC chip, I2C
interface
22. RTC battery holder: supports CR1220
batteries
23. Voltage regulator: 3.3V / 2.5V / 1.8V
24. LFN0038K: IR receiver
25. Buzzer
26. Power indicator
27. ACT indicator: indicating the Micro SD
card status
28. User LEDs
Version：V1.0，Date：20171101
29. User Keys
30. BOOT selection
- EN: enable the PC to access SD
card/eMMC through USB SLAVE
- DIS: the Compute Module will boot
from SD card/eMMC
31. VGx power selection: config the I/O
level
32. USB HUB enable jumper: HUB
enable and USB SLAVE power
selection
33. ADC/DAC configuration: config the
power supply and reference voltage of
ADC/DAC
34. Peripheral configuration: config the
control pins of UART, user keys, user
LEDs, 1-WIRE interface, IR receiver,
and buzzer
35. Arduino AD selection
- connect 1 and 2: Arduino A0-A5 as
digital control pin
- connect 2 and 3: Arduino A0-A5 as
AD input
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