Epson EPL-9000 Service Manual page 153

Appendix
Table A-5.
Pin No.
107
108
109
110
111
112
113
114
115
116
117
118
119
120
Pin No.
1,2,3,4
5
6
7
8
9
10
11
12
13
14
15
16,17
18,19
20
21
22
23
24
25
26
27
28
29
30
A-10
Pin Assignments (Continued)
Signal Name
A25 o
0
—
NC
o
0
BGAT
o
0
I
I
—
o
0
Table A-6. Pin Assignments
Name
Signal
—
DTCT
o
0
0
0
0
0
DREQ
0
0
0
0
—
—
o
0
0
I/o
DB7
I/o
DB6
DB5
DB4
I/o
DB3
DB2
DB1
DBO
Address bus bit 25
Byte enabfes O
Not connected
Bus request
Bus grant
Bus grant for external device
Bus request for external device
Byte enables 2
Byte enables 3
Option ready
Interrupt request bus bit O
Interrupt request bus bit 1
request bus bit 2
Interrupt request bus bit 3
CPU ID bit
CPU ID bit O
Description
VDC
+5
Interrupt
interrupt
Reset signal
Address bus bit 4
Address bus bit 3
Clock
to option
Data request
Write strobe
Read strobe
option select
Ground
Address bus bit 2
Address bus bit 1
Address bus bit O
Data bit 7
Data bit 6
Data bit 5
Data bit 4
Data bit 3
Data bit 2
Data bit 1
Data bit O
Service
Rev.
,