Sanyo SFX-33 Service Manual page 78

27C512
A15~ 1
u
28 3
v.
A12~ 2 27 g AM
A7~ 3
26 a
A13
A,E 4 25 g A,
A5E 5 24 3A,
A4~ 6 23 A,,
A,~ 7
0 ::_
22 3
OENw
A2~ 6
21
AIO
A, ~
9
20 ~
CEIPGM
Aoc 10
19 307
oar
11 16 Z
06
01 c 12 17 305
02C
13 16 304
GNDE 14 15 z 03
Pin Connection
DIP28,SOP28
n'
NC 1
28
VCC
A12 2 27 WE
A7 3 26 CE2
A640
25 A8
:
A5 5
q
24 A9
A4 6
~
23 All
A3 7
03
q
22 OE
AZ 6
>
21 Alo
rn-
A1 9
(n
20 ml
z
AO 10 ~ 19 1/06
1/01 11
g
18 1/07
1/02 12 17 1/06
:X-K
Top view
AO-A12 : Address Input
WE : Read/write control input
OE : Out-put enable input
CEI,CE2 : Chipenablelnput
l/01 -1/08 : Data lflpUt / out- put
VCC,GND : Power/Ground pin
Vcc *
DATA OUTPUTS
00-07
GND ~
VPP -
11111111
AO-A15
ADDRESS
INPUTS
F
Y
DECODER
x
a-
DECODER
Block
Diagram
G
524,288-BIT
CELL MATRIX
A5 –
A6 –
%
A7 – %
j
AS – $ g
Memory Cell Array
A9 –
256 X 256
g
u
Alo – ~
~
All – <
A12 –
-
- I I
Vcc
GND
1/01
1/08
78