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Interconnect Signals
J5 connector
3
3-18
Connector J5 is the port labeled PRINTER on the MVME712M front
panel. This is a Centronics type parallel port. Each pin connection, signal
mnemonic, and signal characteristic for the printer port connector is listed
in the following table.
Table 3-7. Connector J5 interconnect signals
Pin
Signal
Number
Mnemonic
1
PRSTB*
2
PRD0
3
PRD1
4
PRD2
5
PRD3
6
PRD4
7
PRD5
8
PRD6
9
PRD7
10
PRACK*
11
PRBSY
12
PRPE
13
PRSEL
14,15
16
GND
17,18
19-30
GND
31
INPRIME*
32
PRFAULT*
33-36
Signal Name and Description
DATA STROBE - an active low output pulse used to
clock data from the system to the printer.
DATA (bit 0)
DATA (bit 1)
DATA (bit 2)
DATA (bit 3)
DATA (bit 4)
DATA (bit 5)
DATA (bit 6)
DATA (bit 7)
DATA ACKNOWLEDGE - a low level input pulse
indicating that the next character may be sent.
BUSY - an input signal indicating that the printer
cannot receive data.
PAPER EMPTY - out of paper.
SELECTED - an input signal indicating that the printer
is selected.
Not used.
GROUND
Not used.
GROUND
INPUT PRIME - an output signal that clears the
printer buffer and initializes the logic.
FAULT - an input signal that indicates a printer fault
condition.
Not used.
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