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!.-.....-- -
..
MZ 3500
7.
PRINTER INTERFACE
7-1. Printer interfacing circu it
Z8D
SUB
CPU
A~~'A~5
i\~G'i\S7
An
Ch.p
10I-lQI----a
WRI-----C1
Se le, \
Ill"
"oer
S03
AI
~-r-------~-;
AD
DSD
DSl
DS2
DS3
DS4
DS5
nSG
D57
CS 8255
PAD
I-ID
PAl
PA2
WR
PA3
Al
PA4
AO
PA5
PAG
PA7
PC5
PCG
PC7
peo
PCl
PC2
LS244
DATAl
DA1A2
DATA3
DATA4
iDATl\5
DATA6
DATA7
DATA8
STROBE
7-2. Parallel interfacing signals
• 2,4,6, ... 28 are GND.
• Above pin numbers are of the mOOel·3500 malO unit .
..
-
Pin No.
S.gnal name
IN/OUT
Function
1
SiROEl
- PRINTER
Data is transfered to prtnter when STROB is h.gh.
-- -
.
..
3
DATA 1
5
DATA 2
7
DATA 3
9
DATA 4
- PRINTER
Data output to the printer
11
DATA 5
13
DATA 6
15
DATA 7
17
DATA 8
19
ACK
- PRINTER
Indicates the end of character ,"put or function input
I
21
BUSY
.
PRINTER
When high, It enables to receive data
23
PE
.- PRINTER
When high, It indicates paper empty
25
PDTR
.
PRINTER
When high, It Indicates the SELECT mode (receive enabled).
27
SYSRES
- PRINTEcR
Reset Signal, normally high
-71\-
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