Motorola MVME712B - Manual (Page 54)

Interconnect Signals
MVME712A/D3 3-21
3
Connector J15 Interconnect Signals (MVME712 x )
Connector J15 is the printer port on the MVME712x (MVME712-12,
MVME712-13, MVME712A, and MVME712AM). Each pin connection, signal
mnemonic, and signal characteristic for the connector is listed in
Table 3-14 .
Table 3-14. Connector J15 Interconnect Signals (MVME712 x)
Pin
Number
Signal
Mnemonic
Signal Name and Description
1 PRSTB* DATA STROBE - an active low output
pulse used to clock data from the system
to the printer.
2 PRD0 DATA (bit 0)
3 PRD1 DATA (bit 1)
4 PRD2 DATA (bit 2)
5 PRD3 DATA (bit 3)
6 PRD4 DATA (bit 4)
7 PRD5 DATA (bit 5)
8 PRD6 DATA (bit 6)
9 PRD7 DATA (bit 7)
10 PRACK* DATA ACKNOWLEDGE - a low level
input pulse indicating that the next
character may be sent.
11 PRBSY BUSY - an input signal indicating that the
printer cannot receive data.
12 PRPE PAPER EMPTY - out of paper.
13 PRSEL SELECTED - an input signal indicating
that the printer is selected.
14 Not used.
15 PRFAULT* FAULT - an input signal that indicates a
printer fault condition.
16 INPRIME* INPUT PRIME - an output signal that
clears the printer buffer and initializes the
logic.
17 Not used.
18-25 GND GROUND