Quick Reference Guide

10
41
NC(Keep float)
42
GND
43
NC(Keep float)
44
NC(Keep float)
45
NC(Keep float)
46
GND
Signal Description
Function
Pin
number
Signal name
I/O
Description
Commen
t
I2C I/F
1
I2C3_SCL(1.8V)
Bidirection
I2C-bus Clock
3
I2C3_SDA(1.8V)
Bidirection
I2C-bus data
input/output
UART
I/F
15
FF_RXD
Input
UART data input,
active high
17
FF_TXD
Output
UART data
output, active
high
19
FF_CTS
Input
UART clear to
send, active low
21
FF_RTS
Output
UART request to
send, active low
SPI I/F
4
SPI1_CS#(1.8V)
Output
SPI Chip select
6
SPI1_MOSI(1.8V)
Output
SPI data output
8
SPI1_MISO(1.8V)
Input
SPI data input
9
SPI1_CLK(1.8V)
Output
SPI Clock output
34
PLUG_IN#
Input
External Device
detection
Connect
to GND
36
GPIO_1
I/O
Reserve GPIO
from CPU