J20 Connector; Table 3-10. Connector J20 Interconnect Signals - Motorola MVME712M Installation And Use Manual

Interconnect Signals
Table 3-9. Connectors J7 - J10 Interconnect Signals (Continued)
Pin Number
3
16
17
18-19
20
21-23
24
25

J20 Connector

Pin Number
1
2
3-22
Signal
Mnemonic
Not used.
ERRXC4 RECEIVE CLOCK (port 4 only) - This line can be
configured to clock input data from a terminal to a
modem.
Not used.
EDTR DATA TERMINAL READY - A signal from the terminal
to the modem indicating that the terminal is ready to
send or receive data.
Not used.
ETTXC4 TRANSMIT CLOCK (port 4 only) - This line can be
configured to clock output data to the modem from the
terminal.
Not used.
Connector J20 is the internal modem port. Each pin connection,
signal mnemonic, and signal characteristic for the modem port
connector is listed in Table 3-10.

Table 3-10. Connector J20 Interconnect Signals

Signal
Mnemonic
CTS2 CLEAR TO SEND - CTS is a function supplied to the
terminal by the modem, and indicates that it is
permissible to begin transmission of a message. When
using a modem, CTS follows the off-to-on transition of
RTS after a time delay.
TXD2 TRANSMIT DATA - data to be transmitted is
furnished on this line to the modem from the terminal.
Signal Name and Description
Signal Name and Description