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CIRCUIT OPERATION
DESCRIPTION
PIN
PORT
20
R03
21
R1O
22
Rll
23
R12
24
R13
25
R20
26
R21
27
R22
28
R23
29
R30
30
R31/TIMo
31
IilTO
32
INT1
33
SEG1
64
SEG32
65
COM1
66
COM2
67
COM3
68
COM4
69
V1
70
V2
71
V3
72
N~~lo
73
N(IMO
74
NUMG
75
Vcc
76
Oscl
77
OSC2
78
RESET
79
DO
80
D1
THE WAY OF USING
I/0
o
PORT NAME
CE
Output
terminal
of
communication
chip
ena-
ble
with
PLL.
Key Matrix
Input
terminal
of
key
return
signal
I
I
I
I
o
;
o
K3
K2
K1
KO
KS3
KS2
KS1
KSO
Output
terminal
of
key
sauce
signal
(~~~~llY
keep
it
'Hi".
When key
input
is
, output
the
timing
pulse.)
When the
effective
key
input
is
done,
out-
put
40ms of
lKHz-change
keys
signal.
When finish
autostore:Output
twice
per
40
ms.
When start
SDK search:See
the
explanatory
paragraph.
Beep
o
Output
of
comparator
for
measuring
the
e-
lectric
field
strength
o
I
Vcomp
CE1
Input
terminal
for
changeover
between
the
power
suPPly
of
battery
and
the
electric
battery
When it
becomes
'Lo",
Stop
Mode begins.
I
CD DATA I
Input
terminal
of
communication
data
with
CD Changer(Connected
to CD DATA O)
" SEG1
o
0
Output
of
LCD display
segment
SEG32
Output
of
LCD
display
segment
OPEN
OPEil
GkD
Vcc
Oscl
0SC2
Power
supply
terminal
Use 4. 193MHz-Ceramic
oscillator.
(!)
I
, RESET
Reset
input
terminal
Output
terminal
of
LOUD
When LOUD ON, it's
'Hi".
Audio
mute
output
Active
"Hi"'
LOUD
MUTE
o
0
–lo–
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