Printronix MVP Series - Manual (Page 172)

Interfaces 8–4
Table 8–1. Centronics Interface Signals and Pin Assignments Input Signals
Connector
Input Signals Description PIN RETURN
DATA STROBE A low active true pulse (at least 100 ns duration) from the host com-
puter to clock data into the printer. Data lines must stabilize for at
least 50 ns before DATA STROBE is sent. 1 19
DATA LINE 1
DATA LINE 2
DATA LINE 3
DATA LINE 4
DATA LINE 5
DATA LINE 6
DATA LINE 7
DATA LINE 8 Eight high active lines from the host computer forming a character
byte or a Control Code byte.
Refer to Configuration Option 60, Section 5.6, for DATA LINE 8
control.
2
3
4
5
6
7
8
9 20
21
22
23
24
25
26
27
PAPER
INSTRUCTION Enables EVFU control (when clocked into printer by DATA
STROBE). Effective only when Configuration Option 60 is set 60.2
and 61 is set to 61.1. DATA STROBE timing is the same as for data
lines. 15 14
Table 8–2. Centronics Interface Signals and Pin Assignments Output Signals
Connector
Output Signal Description PIN RETURN
ACKNLG Low active pulse from the printer to indicate the printer is ready for the
next data transfer. 10 28
SLCT A high active level (when PE level is low) from the printer to indicate the
printer is ready to receive data and the RDY switch has been activated. 13
32 N/A
PE A high active level from the printer to indicate a check (CHK) condition. 12 N/A
BUSY A high active level from the printer to indicate a check (CHK) condition. 11 29
5 VOLT
TEST Supplies +5V (at one Ampere) output for powering a Printronix Test
Exerciser (Exerciser not required for the L150)> 18 N/A
CHASSIS
GROUND Connections for a cable shield. 17 N/A
SPARE Not Used. 30
31
32
34
34
36