A.1 Interface Interconnections
Figure A–1 (Cont.) Parallel Port Connector
DATA 1-8
DATA STROBE
ACK
BUSY
FAULT
SELECT
CALL (PE)
INPUT PRIME
External
Device
(Host
Computer)
Printer
2
1
9
1
10
11
32
13
12
31
MLO-004888
Table A–1 Parallel Interface Pin Assignment
Pin
Direction
Signal
Description
1
To printer
STROBE L
STROBE pulse low to read data.
A strobe low signal will raise
BUSY line to high.
2
To printer
DATA BIT 1
1
3
To printer
DATA BIT 2
1
4
To printer
DATA BIT 3
1
5
To printer
DATA BIT 4
1
6
To printer
DATA BIT 5
1
7
To printer
DATA BIT 6
1
8
To printer
DATA BIT 7
1
9
To printer
DATA BIT 8
1
1
These signals are the 1st to the 8th bits of parallel data and are active high for a logical 1.
(continued on next page)
A–2 Supplemental Information
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