User's Manual

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iotTech Corporation, Taiwan
Doc. NO:
ITM-FCC3F1 User Manual
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4.2 Pin Definition
Pin No.r
Pin-Define
Type
Description
1
GND
P
Ground
2
VBAT
P
Main Power Supply Input 3.3V
3
CHIP_EN
I
Active High to Enable Whole Module
4
NC
－
NC
5
NC
－
NC
6
GPIO2
I/O
General Purpose Input/Output
7
GPIO3
I/O
General Purpose Input/Output
8
XTAL32-I
I
External 32.768KHz Crystal Input Pin
9
XTAL32-O
O
External 32.768KHz Crystal Output Pin
10
GPIO4
I/O
General Purpose Input/Output
11
GPIO5
I/O
General Purpose Input/Output
12
UART1_RTS_N /
GPIO6
I/O
UART Request to Send (default) /
General Purpose Input/Output
13
GPIO23
I/O
General Purpose Input/Output
14
UART1_CTS_N /
GPIO7
I/O
UART Clear to Send (default) /
General Purpose Input/Output
15
GND
GND
Ground
16
NC
－
NC
17
SPI0_IO2 /
GPIO16
I/O
SPI Input/Output (default) /
General Purpose Input/Output
18
SPI0_IO3 /
GPIO17
I/O
SPI Input/Output (default) /
General Purpose Input/Output
19
SPI0_CS /
GPIO12
I/O
SPI Chip Select (default) /
General Purpose Input/Output
20
SPI0_CLK /
GPIO13
I/O
SPI Serial Clock (default) /
General Purpose Input/Output
21
SPI0_IO0 /
GPIO14
I/O
SPI Input/Output (default) /
General Purpose Input/Output
22
SPI0_IO1 /
GPIO15
I/O
SPI Input/Output (default) /
General Purpose Input/Output
23
UART1_TXD /
GPIO8
I/O
UART Serial Data Transmit for SYSLOG (default) /
General Purpose Input/Output
24
UART1_RXD /
GPIO9
I/O
UART Serial Data Receive for SYSLOG (default) /
General Purpose Input/Output