Motorola MVME712-10 User Manual page 41

Table 3-5: I/O Connector J9 Interconnect Signals (Continued)
Signal
Pin Number
Mnemonic
63 SRXCI3
64 GND
65 STXD4B
66 SRTS4B
67 SDTR4B
68 SRXCO4B
69 GND
70 SRXD4
71 SCTS4
MVME712-10/D1
Signal Name and Description
RECEIVE CLOCK IN (serial port 4) - this line can
be conÞgured to clock input data from a terminal
to a modem.
GROUND
TRANSMIT DATA (serial port 3) - data to be
transmitted is furnished on this line to the modem
from the terminal.
REQUEST TO SEND (serial port 4) - RTS is sup-
plied by the terminal to the modem when it is
required to transmit a message. With RTS off, the
modem carrier remains off. When RTS is turned
on, the modem immediately turns on the carrier.
DATA TERMINAL READY (serial port 3) - a sig-
nal from the terminal to the modem indicating
that the terminal is ready to send or receive data.
RECEIVE CLOCK OUT (serial port 4) - this line
can be conÞgured to clock input data from a ter-
minal to a modem.
GROUND
RECEIVE DATA (serial port 4) - data that is
demodulated from the receive line is presented to
the terminal by the modem.
CLEAR TO SEND (serial port 4) - CTS is a func-
tion supplied to the terminal by the modem, and
indicates that it is permissible to begin transmis-
sion of a message. When using a modem, CTS fol-
lows the off-to-on transition of RTS after a time
delay.
Interconnect Signals
3-11
3