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RS485 models
Pin
Signal
1
I2CCLK
2
RD 0
3
TD 0
4
NC
5
OUT 3
6
I2CDAT
7
RTS 0
8
CTS 0
9
IN 10
10
VEXT
11
IN 2
12
OUT 4
13
ADC 2
14
GND
15
ADC 1
GPS‐BT models
Pin
Signal
1
I2CCLK
2
NC
3
NC
4
IO 1 (GPIO 9)
5
OUT 2
6
I2CDAT
7
NC
8
NC
9
ADC 2
10
VEXT
11
IN 2
12
OUT 3
13
IN 3
14
GND
15
ADC 1
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Direction Description
Output
I2C clock signal
Output
Main RS232 ASC0 UART signal: Received data
Input
Main RS232 ASC0 UART signal: Transmitted data
Output
Opto‐isolated output GPIO8 (open collector)
I/O
I2C data line
Input
Main RS232 ASC0 UART signal: Request to send
Output
Main RS232 ASC0 UART signal: Clear to send
Input
Opto‐isolated input GPIO10
Output
Output voltage reference (4.1V)
Input
Opto‐isolated input GPIO7
Output
Opto‐isolated output GPIO4 (open collector)
Input
Analog to Digital converter input 2
Ground connection
Input
Analog to Digital converter input 1
Direction Description
Output
I2C clock signal
I/O
CMOS General Purpose Digital Input/Output 1
Output
Opto‐isolated output GPIO8 (open collector)
I/O
I2C data line
Input
Analog to Digital converter input 2
Output
Output voltage reference (3.86V)
Input
Opto‐isolated input 2 GPIO7
Output
Opto‐isolated output GPIO4 (open collector)
Input
Opto‐isolated input 3 GPIO10
Ground connection
Input
Analog to Digital converter input 1
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MTX M2M® by MATRIX ELECTRONICA S.L.U
MTX‐3G‐JAVA Family
2015/10 v1.6
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