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100
A. Specifications
❏ Parallel interface specifications
• Input connector (36-pin parallel)
Notes: 1. HIGH is pulled up to + 5V by 2.2k Ω resistor.
2. LOW is pulled down to GND by 2.2kΩ resistor.
3. NC stands for no connection.
4. CHASSIS GND and GND are connected in the printer.
5. SELECT IN signal is HIGH to accept a control code.
• Data input timing chart and input condition
PIN SIGNAL IN/OUT PIN SIGNAL IN/OUT
1 STROBE IN 19 GND
2 DATA 1 IN 20 GND
3 DATA 2 IN 21 GND
4 DATA 3 IN 22 GND
5 DATA 4 IN 23 GND
6 DATA 5 IN 24 GND
7 DATA 6 IN 25 GND
8 DATA 7 IN 26 GND
9 DATA 8 IN 27 GND
10 ACK OUT 28 GND
11 BUSY OUT 29 GND
12 PE OUT 30 HIGH
13 SELECT OUT 31 INITIAL IN
14 AUTOFEED IN 32 ERROR OUT
15 HIGH 33 HIGH
16 LOW 34 NC
17 CHASSIS GND 35 HIGH
18 HIGH 36 SELECT IN IN
181716151413121110 9 8 7 6 5 4 3 2 1
363534333231302928272625242322212019
1-50 µs
1 µs min.
7 - 10 µs
4-6µs
4-6 µs
DATA 1-8
BUSY
STROBE
ACK
0 µs min.
1 µs
max.
INITIAL
BUSY
ACK
50 µs max.
50 µs min.
Data input
Initialization
1 µs min.
7 - 10 µs
4-6 µs4-6 µs
+5V
2.2k
74LS14
or equivalent
Input
DATA1-8
AUTO FEED
SELECT IN
+5V
100
330pF
STORBE
2.2k
INITIAL
+5V
100
1000pF
2.2k
Input
Input
Inside printer
74LS04
or equivalent
74LS14
or equivalent