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31 P4 I/O
Port
4
32 P7 I/O
Port
7
33 P6 I/O
Port
6
34 UART_TX O
Debug
UART
transmit
port
Debug UART receiver port. After power on reset, if
UP_RX =1, firmware download mode UP_RX=0,
normal mode
35 UART_RX I
36 P2 I/O
Port
2
37 P21 I/O
Port
21
38
RESET_N
I
Active low system reset with a weak pull up.
39 P3 I/O
Port
3
40 P1 I/O
Port
1
41 P23 I/O
Port
23
42 P22 I/O
Port
22
43
P36/SCLK/ADC
I/O / O / I
Port 36 / SCLK for SPI Interface / Battery Detector Input
44 P8 I/O
Port
8
45 P9 I/O
Port
9
46
P35/ADC
I/O / I
Port 35 / Battery Detector Input
47 GND
Power
System
ground
P.S. CS for SPI interface could be configured by any PIOs except module Pin 4, 23, 24,
27 and 43.
9
Radicom Research, Inc.
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