Motorola MVME187 User Manual
Levels of Implementation
E-5
E
Figure E-1. Middle-of-the-Road EIA-232-D Configuration
3
TXD
RXD
RTS
CTS
DCD
TXC
RXC
-12V
TXD
RXD
RTS
CTS
DCD
TXC
RXC
OPTIONAL
HARDWARE
TRANSPARENT
MODE
HARDWARE
TRANSPARENT
MODE
LOGIC
470
Ω
39k
Ω
39k
Ω
39k
Ω
470
Ω
39k
Ω
-12V
2
1
5
6
8
7
7
1
20
2
3
4
5
6
CHASSIS GND
CONNECTOR
TO
TERMINAL
TO
TERMINAL
CONNECTOR
TO
MODEM
OR
HOST SYSTEM
TO
MODEM
OR
HOST SYSTEM
RXD
TXD
NC
CTS
DSR
DCD
SIG GND
DTR
TXD
RXD
RTS
CTS
DCD
-12V
+12V
-12V
+12V
+12V
GND
+12V
SIG GND
NC
cb181 9210
470
Ω
SERIAL PORT
LS08
LS08
470
Ω
470
Ω
470
Ω
SERIAL PORT
1489A
1489A
1489A
1488
1488
1488
1489A