Sharp CP-C7000 - Page 58

CD-K7000V,CP-C7000
– 58 –
Figure 58 BLOCK DIAGRAM OF IC
ICK2 VHiM65847AFP1: Key Control (M65847AFP)
A D C O N T
D A C O N T1
D A C O N T2
K E Y D O W N
K E Y U P
C L K O / K E Y 0
S D A T A / K E Y 1
S C K / K E Y 2
S T R O B E / K E Y 3
T E S T / K E Y 4
K E Y 5
R E F
G N D
V C C
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
M O D E 2
M O D E 1
D A I N T O U T
D A I N T I N
A D I N T O U T
A D I N T I N
L P F 1 I N
L P F 1 O U T
H P F I N
H P F O U T
L P F 2 I N
L P F 2 O U T
M I X I N
M I X O U T
LPF1 IN
LPF1 OUT
ADCO NT
ADINTIN
ADINTOUT
DACONT1 DAINTOUT
DACONT2
DAINTIN
LPF2 IN
LPF2OUT
VCC
GND
MIXOUTMIXIN
TEST
/KEY
4
SCK
/KEY2
KEYUP
KEY5
STROBE
/KEY3
SDATA
/KEY1
MODE2
KEYDOWN
MODE1
CLKO
/KEY0
HPFOUTHPFIN
REF
REF
LPF1
REF
LPF2
REF
MIX
HPF
REF
CLOCK
GENERATOR
A / D
D / A
R A M
L O G I C
1/2V CC
RESET
22
21
1
24
23
2
3
26
25
18
17
14
13
1516
11
10
9
8
75
4
28276
19
20
12