Motorola MVME712B - Manual (Page 38)

Interconnect Signals
MVME712A/D3 3-5
3
20 PRACK* DATA ACKNOWLEDGE (Printer) - a low level
input pulse indicating that the next character
may be sent.
21 PRPE PAPER EMPTY (Printer) - out of paper.
22 PRBSY BUSY (Printer) - an input signal indicating that
the printer cannot receive data.
23 INPRIME* INPUT PRIME (Printer) - an output signal that
clears the printer buffer and initializes the logic.
24 PRSEL SELECTED (Printer) - an input signal indicating
that the printer is selected.
25 GND GROUND
26 PRFAULT* FAULT (Printer) - an input signal that indicates
a printer fault condition.
27 GND GROUND
28 TXD3 TRANSMIT DATA (serial port 3) - data to be
transmitted is furnished on this line to the
modem from the terminal.
29 GND GROUND
30 RXD3 RECEIVE DATA (serial port 3) - data that is
demodulated from the receive line is presented
to the terminal by the modem.
31 CTS3 CLEAR TO SEND (serial port 3) - 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.
32 RTS3 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.
33 DCD3 DATA CARRIER DETECT (serial port 3) - sent
by the modem to the terminal to indicate that a
valid carrier is being received.
Table 3-4. Connector J2 Interconnect Signals (LCP2 Adapter) (Continued)
Pin
Number
Signal
Mnemonic
Signal Name and Description