Epson SQ-B50/2550 Technical Manual page 273

Table A-G. E01 A24GA Terminal Functions
Pin No.
Name I/O
Function
11 RXD (IN) I
Receive serial data
35 PIS
I Parallel/serial select
9
DIN7 I Data bus 7
8
DIN6 I
Data bus 6
7 DIN5
I Data bus 5
5
DIN4 I Data bus 4
4
DIN3 I Data bus 3
3
DIN2 I
Data bus 2
2
DIN1 I Data bus 1
1
DINO I Data bus 0
10 STB I
STROBE signal
24 ACK
0 ACKNlG signal
23 BUSY
0 BUSY signal
28 PE
0 PE signal
26
ERR 0
ERROR signal
12 INIT I
INIT signal
36 SUN
I SlCTIN signal
57
AFXT I AUTO FEED XT signal
19 SlCT I SlCT signal
6,39 VCC I +5 VDC
46 ENSTENB
-
Pulled down
13,29, GND
-
Ground
34,48,
58, 64
63 P14 0 Multi purpose I/O
30 P20
0 Multi purpose I/O
31 P21
0 Multi purpose I/O
32
P22 0 Multi purpose I/O
33
P23 0
Multi purpose I/O
16 TM I
Not used (open)
61
I
P12 0
Multi purpose I/O
60
P11 0 Multi purpose I/O
59 PlO 0 Multi purpose I/O
62 P13 0
OULLt::1
21 READY
0 READY lED
20
IBF 0 BUSY latch signal
15 ITO 0
INIT latch signal
47 ClK I
Watch-dog timer clock
42 RD I
Read strobe
43
WR
I Write strobe
49 DO I/O
Data bus 0
50
D1 I/O Data bus 1
51 D2 I/O
Data bus 2
52 D3 I/O
Data bus 3
53
D4 I/O Data bus 4
54 D5 I/O Data bus 5
55
D6 I/O Data bus 6
56
D7
I/O
Data bus 7
37
AO I
Address bus 0
38
A1
I Address bus 1
40 A2
I Address bus 2
44 WDOG
0 Watch-dog timer
A-15
REV.-A