AMSTRAD CPC664 - Page 6

FUNCTION
FOR
A
MICROCOMPUTER AND
IC'S
CPC664
FUNCTION
DIAGRAMS
ICI07
ADRESS
BUS
I/O
PORTB
Aid
H-.4
8
E~A7
H^6
E-A4
E~A2
lh~A,
M~Ao.
2^~GND
M~
RFSH
)sYSTEM
^
m
j
CONTROL
M'-RESET1~CPU
±. CONTROL
X]~~DUSRQ-~<
CPU
E-wmy
B
f
0NTR0L
Z^—BUSAK
-I
M~
g
~
R
}SYSTEM
|7],fiBj
C0NTR0L
KEYBOAP.D
SU.
ANALOG
CHANNEL C
E
r
EST 1
1
Vcc
ANALOG
CHANNEL
B
ANALOG
CHANNAL A
LI
K
U
VSS
K
10
Al
LI
10A
6
E
10
As
E
I0A4
Ee
10A3
W.
10A2
m
lOAl
d
lOAo
m
ICI02
CONNCTOR
NO.
2
3 4
9 P P
V
DEL
T,
T
CLR
V
ESC
^
T
COPE
T
IT.
ENTE
R
7~7
TAB
W
7~
T
/
/ 7
7~
/
t:
7~
SHIf
r
CAPS
LOCK
V
\
7"
7
—
ENTE
-R
SPACE
KEY
„
,_
-p
—
0/5
CTRL
RESET
C
RD
C
WR
C
CS
C
A
C
DB
C
DBi
C
DB
2
C
DB
3
C
DB
4
C
DB
5
C
DB
6
C
DB
7
C
DROC
DACKC
TCC
IDXC
INT
CLK
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
~^J~
UPD
765A
40
3
39
38
3
37
D
36]
35[3
34
33
32
31
30
29
28
27
26
25
24
23
22
21
vcc
3
RW/SEEK
LCT/DIR
|3
FR/STP
HDL
RDY
D
WP/TS
3
FLT/TRc
3
PS
3
PSi
3
WDA
3
US
i3 US
n
3
HD
3
MFM
3
WE
3 VCO
3
RD
RDW
3
WCK