Motorola MVME712M Installation And Use Manual page 61

Table 3-4. Connector J2 Interconnect Signals (Continued)
Signal
Pin Number
Mnemonic
A14 TXD3
A15 RXD3
A16 RTS3
A17 DTR3
A18-A20 GND
A21 CTS1/DCD1
A22 TXD4
A23 RXD4
A24 RTS4
A25 TRXC4
Signal Name and Description
TRANSMIT DATA (Serial Port 3) - data to be
transmitted is furnished on this line to the modem from
the terminal.
RECEIVE DATA (Serial Port 3) - data that is
demodulated from the receive line is presented to the
terminal by the modem.
REQUEST TO SEND (Serial Port 3) - 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.
DATA TERMINAL READY (Serial Port 3) - a signal
from the terminal to the modem indicating that the
terminal is ready to send or receive data.
GROUND
CLEAR TO SEND (Serial Port 1) - 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.
TRANSMIT DATA (Serial Port 4) - data to be
transmitted is furnished on this line to the modem from
the terminal.
RECEIVE DATA (Serial Port 4) - data that is
demodulated from the receive line is presented to the
terminal by the modem.
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.
TRANSMIT CLOCK (Serial Port 4) - this line can be
configured to clock output data to the modem from the
terminal.
MVME712M Transition Module
3
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