Texas Instruments 99/4A - Page 130

6810 RAM
o 128 X 8 STATIC RAM
0 USED AS SCRATCH PAD (CPU RAM)
o TWO DEVICES ARE USED TO MAKE A 128 X 15 MEMORY AREA
o +5, GND ONLY
1 c
Ow O
v cc
□ 34
2 C
oo
AO □ 23
3 C
01
A1
3 33
4 C
02
Al
□ 21
* c
03
A3 □ 34
a C
04 A*
□ 1*
3 c o*
AS
□ 14
a C
04
A4
□ IT
• t
07
□ 14
r
CSO
Ss
□ 14
11 c
a<
Qx
□ K
11 £
CX3
□ 13
DO - D7 = DATA 1/0
A0_- A6 = ADDRESS LINES
R/W = HIGH IS READ, LOW IS WRITE
TO BE ENABLED: CSO & CSS MUST BE HIGH
CSLCS2.CSA, & CSS MUST BE LOW
Fig. 39
RAG 05-03-82
1 20