D: rs-485 programming – Intel OPEN (660) 120/140/150 II User Manual
Page 153
User Manual version 2.1
OPEN (660) 120/140/150
9-143
D: RS-485 Programming
The RS-485 is software programmable. I order to
program the RS-485, a program writing I/O port address
204 (hex) needs to be written first. The output data is a
value of RS-485 TX/RX status. The data function
definition is listed below:
RS-485
SD0
SD1
TX
RX
0
0
Disable
Enable
0
1
Enable
Enable
1
0
Disable
Disable
1
1
Enable
Enable
Note: data D7~D2 have no bits concern
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