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XR17V358/354 EVALUATION BOARD USER’S MANUAL REV. 1.0.1
2.5 Jumper/Switch Settings for RS-232 or RS-485 for Master Device
The following table (Table 5) shows the setting for selecting between the RS-232 or RS-485 modes for the
master device. The Half-duplex RS-485 mode can be enabled by either setting the FCTR bit-5 to 1 or
connecting the EN485# pin to GND.
TABLE 5: SETTINGS FOR RS-232 OR RS-485 MODE FOR MASTER DEVICE
JUMPERS/
S
WITCH
FUNCTIONS COMMENTS
J13 3.3V Supply voltage pin for transceivers Not installed. Trace between 1&2.
J41 Enable Auto RS-485 Half-Duplex Direction Control
upon power-up
Jumper between 1&2 enables this feature for all 8
channels. This feature can be disabled in the software
after power-up.
J54 Enable IR mode upon power-up Jumper between 1&2 enables this feature for all 8
channels. This feature can be disabled in the software
after power-up.
SW5 Indicate whether slave device is presented or not.
OFF ON
1
2
3
4
5
6
7
8
SW5
Default for “0A-EVB”
Slave is not present (default for "0A-EVB" board).
■ Position 1 = OFF
Slave is present (default for "Ex-EVB" board).
■ Position 1 = ON
Position 2, Position 3, Position 4, Position 5, Position
6, Position 7, and Position 8 are for internal use only.
They should be set as OFF status (default).
