2.5.1
Channel 1 - RS-422
2.5.2
Channel 2 - RS-422
Page 2-4
PCM-DSPIO/J1708 OPERATIONS MANUAL
981117
WinSystems - "The Embedded Systems Authority"
U2 - Not Installed
U5 - Installed
U6 - Installed
1 o o 6
2 o o 7
3 o o 8
4 o o 9
5 o
J5
J6
CH1 DB9
Jumper Positions
Driver IC Status
I/O Connector Pin Defs
N/C
TX+
TX-
N/C
GND
RX+
RX-
N/C
N/C
1
o
2
o
3
o
1
o
2
o
3
o
U1 - Not Installed
U3 - Installed
U4 - Installed
1 o o 6
2 o o 7
3 o o 8
4 o o 9
5 o
J2
J3
CH2 DB9
Jumper Positions
Driver IC Status
I/O Connector Pin Defs
N/C
TX+
TX-
N/C
GND
RX+
RX-
N/C
N/C
1
o
2
o
3
o
1
o
2
o
3
o
RS- 422 NOTE : When used in RS- 422
mode the trans mit ter must be en abled via
soft ware by set ting the RTS bit in the Mo -
dem Con trol reg is ter (Bit 1).
RS- 422 NOTE : When used in RS- 422
mode the trans mit ter must be en abled via
soft ware by set ting the RTS bit in the Mo -
dem Con trol reg is ter (Bit 1).
R7
R5
R6
RX+
RX-
vcc
R10
R11
R12
RX+
RX-
vcc
