Parallel interface specifications – Seiko BX-900 User Manual
Page 108
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 2.2k
Ω 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.
Bidirectional (IEEE1284 Nibble mode) is available.
• 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
1817 1615141312 1110 9 8 7 6 5 4 3 2 1
3635 3433323130 2928 2726252423 22 212019
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 µs
4-6 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