TS-440S
M B8 4 1 8-LP20-GRA (Control unit IC50)
JJPD7800
T L
C I C 4 l
EIO
SN74LSl38
A I O
l.
B A T T
Address
buffer
+ 5V
M B M 2 7 1 28 (Control u n it IC52)
Low
decoder
SEM I C O N D U CTOR
M emorio l
A l ley
1 28 x l 6 x 8
I
/0
ga t e
co l u m n d ecoder
I
/0
buffer
- 1 10
D o to
-
D o t o o u t p u t
I O X
Oo
07
V oo
G N O
CSB
S y m b o l
P i n n a m e
A o - A 1 0
A d d ress i n put
I( )1 - 1( )x
D ata i n /o u t
C h i p select 1
C S 2
C h i p select 2
W E
Write e n a b l e
V e e
P o w e r ( 1 . 5 V )
G N D
G N D
N C .
N o c o n n ection
+ 1 5 V
�
JJPD7800
Pin name
A o - A 1 3
A d d ress i n put
O u t p u t B uffer
+1 5 V
Oo - 0 1
D ata output
-
C h i p e n a b l e i n put
CE
Y
decoder
y
sel ection
O E
Output e n a b l e i n put
PG M
Program i n put
JJPD
l
7800
Ao
Yo
Y1
1 3 1 072
bi t
14
( 5 1 2 x 256 )
1 5
X
decoder
SN74 LSl38
Memor i a l
a l l y
V e e
Power s u p p l y
V p p
Program power s u p p l y
G N D
G N D
30