Hitachi GCR-8480B, User Manual

Page: 19 / 25

17
• IC501 HMS895300
Pin Description
Pin No. Signal Type COMMENT
1 Vss P Logic GND
2 A11 O PROM ADDRESS
3 A9 O
4 A8 O
5 A13 O
6 A14 O
7 Wstrobe O Write Strobe
8 A16 O 128K
9 A15 O 64K
10 A12 O
11 A7 O
12 A6 O
13 A5 O
14 A4 O
15 A3 O
16 A2 O
17 A1 O
18 A0 O
19 DATA0 B PROM DATA
20 DATA1 B
21 V
DDD
P DRAM VDD 5V
22 V
DD
1
P 3.3V
23 Vss P Logic GND
24 V
SSD
P DRAM GND
25 DATA2 B PROM DATA
26 DATA3 B
27 DATA4 B
28 DATA5 B
29 DATA6 B
30 DATA7 B
31 ZCE O Chip Enable Signal
32 A10 O PROM ADDRESS
33 Psen O Access Enable Signal
34 IOPORT0 B General Input/Output Port
35 IOPORT1 B
36 IOPORT2 B
TYPE
I :INPUT B :BIDIRECTION NC :NOT CONNECT O :OUTPUT P :POWER