Motorola MVME712M Installation And Use Manual page 54

Interconnect Signals
Table 3-2. Connector J2 Interconnect Signals (Continued)
Pin Number
3
A23
A24
A25
A26
A27
A28
A29
A30
A31
3-4
Signal
Mnemonic
RXD4 RECEIVE DATA (Serial Port 4) - data that is
demodulated from the receive line is presented to the
terminal by the modem.
RTS4 REQUEST TO SEND (Serial Port 4) - RTS is supplied 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.
TRXC4 TRANSMIT CLOCK (Serial Port 4) - this line can be
configured to clock output data to the modem from the
terminal.
CTS4 CLEAR TO SEND (Serial Port 4) - 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.
DCD4 DATA CARRIER DETECT (Serial Port 4) - sent by the
modem to the terminal to indicate that a valid carrier is
being received.
RTXC4 RECEIVE CLOCK (Serial Port 4) - this line can be
configured to clock input data from a terminal to a
modem.
TXD2 TRANSMIT DATA (Serial Port 2) - data to be
transmitted is furnished on this line to the modem from
the terminal.
RXD2 RECEIVE DATA (Serial Port 2) - data that is
demodulated from the receive line is presented to the
terminal by the modem.
RTS2 REQUEST TO SEND (Serial Port 2) - RTS is supplied 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.
Signal Name and Description