Compute Module IO Board Plus User Manual
3
Version
：
V1.0
，
Date
：
20171101
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
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