AXIOMTEK IFB125, Hardware User Manual

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IFB125 U
ser’s Manual
Introduction
3
1.2.8 COM
 DB9 Pin define
 RS232/RS422/RS485
 COM with TX/RX/RTS/CTS signals
 RS-232/422/485 Interface select by software
Pin RS-232 RS-422 RS-485
1 TX- Data-
2 RX TX+ Data+
3 TX RX+ --
4 RX- --
5 Ground Ground Ground
6 -- --
7 RTS -- --
8 CTS -- --
9 -- --
1.2.9 SPI & I2C
 DB9 Pin define
 1 x SPI function with one chip select
 1 x I2C function
D-sub9 pin define
Pin 3.3V power output SPI I2C
1 CLK
2 SS
3 MOSI
4 MISO
5 PW R GND
6 SIG GND SIG GND
7 SDA
8 SCL
9 3.3V