Radio Shack CCR-81 Technical Service Data

TERMINAL GUIDES & Ie PINOUTS
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3:>
0
2
cO
men
r-z
>
r-O
m;:ll;
<-4
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=en
Co
o
Z2I
fllPlfLOP
TOP VIEW
8 GNO
A9 39
A8 38
A7 37
A636
AS 3~
A4 34
AD 30
AI 31
A3 33
A2 32
,AIO 40
WAIT 24
GNO 29
mil 28
iI 27
RESET 26
~2~
!lrolii 23
WR 22
Rli 21
071OC·1
240
MICROPROCESSOR
TOP VIEW
4 AU
3 Al3
All
A12
~ AI~
6 ClK
7 04
8 03
9 3~
10 06
19 liIl£ll
20 fORO
12 02
13 07
I~ 01
16 jjjJ
11 lOO
18 HAlT
11 ~V
1400
DATA
INPUTS
13
9 OUTPUT
12
11
10
vee 16
2G STR08E I~
27.269.270
fliPIFLOP
TOP VIEW
t--+..:;A:.,:
SE
:o:L:::EC:,:T---l
14
74LS153N
2C1
2Y
21
IIULTIPLEXER
TOP VIEW
2G 2C3
2CO
2C2
1------..----+----lA
B f- ......... -+--+---fB
At------ ......... --lA
IC2
ICI
ICO
IY
IG STR08E
8 SELECT
SN74LS93N
lI2. 232. 2SO. 265
COUHTER
TOP VIEW
OUTPUT 7
DATA
INPUTS
I
INPUT 8 INPUT A
1
1 1
B
X
I----
ROW
NC I
I---
Rom
OA-I
He
00-1
vee
GNO I
He
OC
08,--
NC
IHPUTS
OH
vee 16
I~ ~~~I
14 PARAlLEL
INPUT
13 PARAlLEL
OUTPUT
12] PARAlLEL
11 I PUTS
10
L..----f9 ClEAR
A
SH74LSI66H
lIO. Z1I
SHIfT REGISTER
TOP VIEW
238
DECODER
TOP VIEW
SH74LS42H
ClOCK
INHI81T
ClOCK 7
I GNO
PARAlLEL
INPUTS
vee
I
0 I
I
A
I
3
2
8
I
3
C
I
~
4 0
1
5
r----l
7 6 ,------ 1
GNO r--< 7
r-- 9
r-< 8
r
9
OUTPUTS 4
OUTPUTS
14
I~
vee 16
I~ STR08E
14}INPUTS
13
12 OUTPUT
III
INPUTS
10
9 OUTPUT
vee 16
'------;12
L..-------lll
L..------.410
'-----..0113
IA
2A 4Y
lY 48
28 3A
18 4A
SlI74LSmH
231. 235, 243
249. ZSl. 264
IIULTIPLEXER
TOP VIEW
SELECT I
INPUTS{:
OUTPUT 4
INPUTS{:
OUTPUT 7
8 GNO
Z21
DECODER
TOP VIEW
u
12
11
13
10
A~---+-iA
vee 16
,-------ll~
SH74LSI56Il
IY2
~----<1IY2
SH74LS36IAH
71"1",YO'-_--<1 I YO
I GNO
OUTPUTS 61"1_Y!~_--<11Y1
8 GNO
4Q I~
40 U
40 13
30 2
3- 11
3 10
vee 16
ClOCK 9
Q
Q
Q
ij
vee 16
~ I~
m,m
fliPIFLOP
TOP VIEW
511741.$17511
SH7US367AH
ClRP----..o1~.qClR
ClRP--+~~.qClR
4Y 9
CK 4>--r-+--<:t>CK
CK 4>----i----<P CK
o
Q
lQ
10
I CI.fAR
4 10
~ 20
6
20
7 2Q
I GHO
I GNO
liB, Z2I
TOP VIEW
2 3 4 5 6 1 8
RIA
fRONT VIEW
100 l'
I 13
} 11
• II
5 10
• •
, 0 I
ZS, 26, Z57
TOP VIEW
l[]"
I 13
} 11
• II
5 10
• •
1 •
lIA, l2A,
24. 29. 223.
m, 225. Z2fi,
230. 236. 237,
242. ZSl. ZSJ,
~,266, 273,
214,
TOP VIEW
I[]"
I 13
} 11
• II
5 10
• •
1 I
Z2C
TOP VIEW
vz
NC
Yell
VOUT 10
NC 14
CO~~~~~:' 13
V+ 12
IICI7Z3CP
lI.22.
REGULATOR
TOP VIEW
7 V-
1 NC
2
CURRENT
LIMIT
3 CURRENT
SENSE
4 INVERTING
INPUT
~ NON INVERTlHG
INPUT
6 ¥REf
21L028
RESET PI4 12
6 CLK PI3 II
7 PIS PI2 10
8GNO PIl9
m THRU l4I.
261 THRU Z63
RAIl
TOP VIEW
J QI VOO 16
2 T.t Q2 I~
3 K Q3 14
Q4 13
8046670
I A6 vee II
2 A~ cs 17
3 A4 04 16
4 A3 03 I~
~ A2 02 14
6 Al 01 13
7 AD 00 12
I RSJ RSI II
9 GNO RS2 10
Z29
CHARACTER GENERATOR
TOP VIEW
1188116E
~IOENT
8CE
Q3
fRONT VIEW
I YOO vee 9
ZI3 THRU Z20
RAIl
TOP VIEW
7 AI A~ 10
1 V88 VSS 16
2 DIN CAS 15
3 WI: OOUT 14
4 RAS A6 13
~ AD A3 12
6 A2 A4 II
Ql 9
Qll
15
QIO 14
VOO 16
Q8 13
Q9 12
RESET 11
jfi 10
E B C
G
QI. Q2. Q5
80nOll VIEW
IICI4040ll
ZlC
COUNTER
TOP VIEW
I Q12
2 Q6
3 Q~
4 Q7
~ Q4
6 Q3
7 Q2
I VSS
WIOENT
8CE
Q6
fRONT VIEW
Q4
80nOll VIEW
241
DRIVER
lOP VIEW
IIC7~~2P
23A,24A
TRISTATE INVERTER
TOP VIEW
JlA, II. J3
fRONT VIEW
SlI74U92H
Z56, zsa
DIVIDE 8Y 6.
DIVIDE 8Y 12
TOP VIEW
l22, 13l, l39, 244,
m, 260, Z67, 26&,
m. Z75, Z76
TRI,STATE 8UffER
TOP VIEW
1 I
2
HC
,l 1
Hel
IHPUT IHPUT
~1
3 HC B
A
4
HC
~I
~ vee
GNO I
61----
ROW ~9
71---
ROm ~I
6
27

Radio Shack CCR-81 Specifications

General

Brand	Radio Shack
Model	CCR-81
Category	Desktop
Language	English