Motorola MVME760 User Manual page 34

Support Information
Table 3-1. Connector P2 Interconnect Signals (MVME760) (Continued)
Pin
Number
3
P2
C20
A20
A21
C21
C22
A22
C23
A23
C24
A24
3-12
Signal
Mnemonic
DTR1 DATA TERMINAL READY (serial port 1) - a signal from the
terminal to the modem indicating that the terminal is ready
to send or receive data.
RTS1 REQUEST TO SEND (serial port 1) - 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.
RXD2 RECEIVE DATA (serial port 2) - data that is demodulated
from the receive line is presented to the terminal by the
modem.
GND SIGNAL GROUND
CTS2 CLEAR TO SEND (serial port 2) - 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.
DSR2 DATA SET READY (serial port 2) - a function supplied by
the modem to the terminal to indicate that the modem is
ready to transmit data.
DCD2 DATA CARRIER DETECT (serial port 2) - sent by the
modem to the terminal to indicate that a valid carrier is
being received.
RI2 RING INDICATOR (serial port 2) - Sent by the modem to
the terminal indicating the ringing signal is present.
TXD2 TRANSMIT DATA (serial port 2) - data to be transmitted is
furnished on this line to the modem from the terminal.
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