Sharp PC-1261 - 7. RAM SELECT CE-PLA; PC-1261 Decoder (TC40 H138 P); PC-1260 Decoder (TC40 H000 P)

Input
Out p u t
A
B
y
L
L
H
H L
H
L
H
H
H
H
L
Truth table
Y = ~
Vs s 2Y 2B
l Y 2A lB
l A
7
3A 3 Y 3 B
4A 4 Y
V DD 4B
1 4
Pin configuration
F0 4
Al3
Output
0
0 R A MI
0 1
RAM 2
-
PC-1260
PC-1261
7-2. PC-1260 decoder (TC40HOOOP)
-6-
Don't ca re
I N PUTS
OU T PU T S
EN A B L E SE LE C T
G I
G2A G2 B A B c Y O YI Y 2 Y 3 Y4
Y 5 Y6
Y7
L
*
* * * *
H
H H H H H
H H
*
H
* * * *
H H H
H H H H
H
*
*
H
* * *
H H H H
H H H
H
H L L L L L L H H H H
H H H
H
L L H L L H L H H H
H H H
H L L L H L H H L H
H H H
H
H
L
L H H L H H H
L H H H
H
H
L
L
L L H H H
H
H L H
H H
H L L H L H H H H H
H L H H
H L L L H H H H H H H
H L
H
H L L H
H H H H
H
H H H
H L
Truth table
SELECT ENA BL E
Y7 Vss
D AT A
OU T PUT
A B c ) ,GM G2B G l I
•
VDD
Y6 \
DATA OUTP U TS
.
Pin configuration
F04 Al 3 A l2 A l l
Output
0 0
0 0 RAMl
0
0
0
1
II
2
0
0 1
0
II
3
0
0
1
1
I I
4
0
1
0 0
II
5
7-1. PC-1261 decoder (TC40H 138P)
7. RAM SELECT CE-PLA
-OGIC
2 000 H
DI SP I
20 B FH
2800 1-1
D I S P 2
28 B FH
3000 H
3 0BFH
38 0 0 1-1
3 8 BFH
4 000H
480 0H
50 00H
58 00 H
60 0 0 H
680 0H
'N O N ON ON OFF
ll H 2 H3 H4 HS
tput wave-