6: Setup Mode: Channel Configuration
DeviceLinx™ XPort Direct/XChip Direct SoC User Guide
26
I/F (Interface) Mode
The Interface (I/F) Mode is a bit-coded byte entered in hexadecimal notation.
I/F Mode (4C) ? _
Note:
All bit positions in the table that are blank represent “don’t care” bits
for that particular option, which can be set to a value of 0 or 1.
Table 6-1. Interface Mode Options
I/F Mode Option
7 6 5 4 3 2 1 0
RS-232C
(1)
0 0
RS-422/485 4-wire
(2)
0 1
RS-485 2-wire
(2)
1 1
7
Bit
1 0
8
Bit
1 1
No
Parity
0 0
Even
Parity
1 1
Odd
Parity
0 1
1 stop bit
0 1
2 stop bits
(1)
1
1
(1) 2 stop bits are implemented by the software. This might influence performance.
(2) The RTS pin is used for RS485 transmitter control.
The following table demonstrates how to build some common Interface Mode
settings:
Table 6-2. Common Interface Mode Settings
Common I/F Mode Setting
Binary
Hex
RS-232C, 8-bit, No Parity, 1 stop bit
0100 1100
4C
RS-232C, 7-bit, Even Parity, 1 stop bit
0111 1000
78
RS-485 2-wire, 8-bit, No Parity, 1 stop bit 0100 1111 4F
RS-422, 8-bit, Odd Parity, 1 stop bit
0101 1101 5D
Flow
Flow control sets the local handshaking method for stopping serial input/output.
Flow (00) ? _
Use the following table to select flow control options:
