Datasheet

Compute Module IO Board Plus User Manual
3
Version：V1.0，Date：20171101
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
29. User Keys
30. BOOT selection
31. EN: enable the PC to access SD
card/eMMC through USB SLAVE
32. DIS: the Compute Module will boot
from SD card/eMMC
33. VGx power selection: config the I/O
level
34. USB HUB enable jumper: HUB
enable and USB SLAVE power
selection
35. ADC/DAC configuration: config the
power supply and reference voltage of
ADC/DAC
36. Peripheral configuration: config the
control pins of UART, user keys, user
LEDs, 1-WIRE interface, IR receiver,
and buzzer
37. Arduino AD selection
38. connect 1 and 2: Arduino A0-A5 as
digital control pin
39. connect 2 and 3: Arduino A0-A5 as
AD input