7
REV. 1.0.0
XR21V1414 EVALUATION BOARD USER’S MANUAL
2.2.3
RS-232 mode jumpers (Default setting is RS-232 mode)
The XR21V1414 evaluation board is set in RS-232 mode by default. The following
Table 5
jumper settings
apply to the RS-232 mode:
T
ABLE
5: J
UMPER
S
ETTINGS
F
OR
RS-232 M
ODE
J
UMPERS
L
OCATION
F
UNCTIONS
C
OMMENTS
JP30
Top
Power supply for RS-232 transceiver of
Channel A
Not installed. Trace between pin 1&2
JP31
Top
Power supply for RS-232 transceiver of
Channel B
Not installed. Trace between pin 1&2
JP32
Top
Power supply for RS-232 transceiver of
Channel C
Not installed. Trace between pin 1&2
JP33
Top
Power supply for RS-232 transceiver of
Channel D
Not installed. Trace between pin 1&2
2.2.4
RS-485 mode jumpers
The following
Table 6
jumper setting applies to the RS-485 mode:
T
ABLE
6: J
UMPER
S
ETTINGS
F
OR
RS-485 M
ODE
J
UMPERS
L
OCATION
F
UNCTIONS
C
OMMENTS
JP34
Top
Power supply for RS-485 transceiver of
Channel A
Not installed. Trace between pin 1&2
JP9
Top
Select Channel A RTS or DTR direction
control for TX
Jumper in 1&2 selects RTS based direction control for
TX
Jumper in 2&3 selects DTR based direction control for
TX
JP10
Top
Select Channel A direction control for RX
and TX or always for RX
Jumper in 1&2 selects common direction control for
RX and TX
Jumper in 2&3 enables RX always
JP11
Top
Channel select for half duplex or full
duplex mode
Jumper in 1&2 selects for half duplex mode
Jumper in 2&3 selects for full duplex mode
JP12
Top
Channel select for half duplex or full
duplex mode
Jumper in 1&2 selects for half duplex mode
Jumper in 2&3 selects for full duplex mode
JP35
Top
Power supply for RS-485 transceiver of
Channel B
Not installed. Trace between pin 1&2
JP13
Top
Select Channel B RTS or DTR direction
control for TX
Jumper in 1&2 selects RTS based direction control for
TX
Jumper in 2&3 selects DTR based direction control for
TX
JP14
Top
Select Channel B direction control for RX
and TX or always for RX
Jumper in 1&2 selects common direction control for
RX and TX
Jumper in 2&3 selects common direction control for
RX always
JP15
Top
Channel B select for half duplex or full
duplex mode
Jumper in 1&2 selects for half duplex mode
Jumper in 2&3 selects for full duplex mode
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