Printer Interface - Sharp MZ-350C Service Manual

M Z 3500
7-1. Printer interfacing Circuit
7. PRINTER INTERFACE
AS<t • ASS • AS6 • AS7
HD
A I
Z 80 AO
SUB
CPU
AB C h i p
Decoder
SO3
rfS SIP
3C r—^ — °
<£> Lr-
Cf^r 1
«V» 1—
-^
arallel interfacing Signals
"\ S1W
^
^ DSO
^ DS1
DS2
^ DS3
DS4
^ DS5
v
DS6
DS7
CS 8 2 5 5
PA
H D
I A
PA
WR
PA
A I
PA
A
° PA
PA
PA
PC
PC
PC
PC
PC
PC
J
„
L S 2 4 4
0
1
2
3
4
5
6
7
5
6
7
0
1
2
dS
n/^
c
^
dN
^
cTS
f-
r^o h
\^v
— <<}—«
0^1
°<x|
ArV
* 2, 4, 6..
<
ACK
<§)PE
-(0)PDTR
A'bo've'pin numbers are of the model-3500 main unit.
Pin No.
1
3
5
7
9
11
13
15
17
19
21
23
25
27
Signal name
STROB
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
ACK
BUSY
PE
PDTR
SYSRES
IN/OUT
- PRINTER
~ PRINTER
- PRINTER
«- PRINTER
«- PRINTER
- PRINTER
- PRINTER
Function
Data is transfered to printer when STROB is high.
Data Output to the printer
Indicates the end of Character input or function input.
When high, it enables to receive data.
When high, it indicates paper empty.
When high, it indicates the SELECT mode (receive enabied).
Reset signai, normativ high
- 78 -