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Kenwood KDC-8021 Service Manual page 8

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KDC-8021/M9021/X859
MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROCOMPUTER uPD703033AGF-***-3BA (X25)
Pin Name
26
SW5V
27
BU-DET
28
ACC-DET
29
N.C
30
DIMMER
EXT-AMP-
31
CONT
32
P-CON
33
ANT-CON
34
RESET
35
XT1
36
XT2
37
REGC
38
X2
39
X1
40
Vss
41
Vdd
42
CLKOUT
43
CD MECHA+B
44
P-ON
45
O-DATA
8
I/O
Purpose
I/O 5V power supply terminal. ON: L OFF: Hi-Z
Momentary power down
I
detection terminal.
I
Acc detection terminal.
O
Output Open. Not used.
I
Small detection terminal.
External amp control
O
terminal (200 ms).
I/O Power control terminal.
O
Antenna control terminal.
I
Reset input terminal.
Sub-clock connection
I
terminal.
Sub-clock connection
-
terminal.
Output terminal for
-
capacitor of Reg.
in uCOM.
Main clock connection
-
terminal.
Main clock connection
I
terminal.
-
GND terminal.
Positive power supply
-
terminal.
Internal system clock
O
terminal.
I/O CD 4.7 V output terminal.
I/O SW 14 V control terminal.
External display DATA
I/O
terminal.
Processing Operation
B-U present: "L".
B-U absent (momentary
power down): "H".
Acc present: "L".
Acc absent: "H".
ON: L OFF: H
"L for 40 ms: Bass Boost
Off.
"L" for 70 ms: Bass Boost
Low.
"L" for 100 ms: Bass
Boost High.
POWER ON: H
POWER OFF: Hi-Z
ALL OFF: Hi-Z
TUNER, TI ON: H Other
sources in last FM with
RDS: "H". Other sources
in last FM with RBDS,
TI ON: "H".
Normal: "H". Reset: "L".
Clock count. Working
while power is OFF.
During power ON:
Oscillating. During power
OFF and momentary
power down: Oscillation
stopped.
With CD source: "L".
Other sources than CD:
"Hi-Z". Models without
MP3 or WMA: Output "L".
ON: 50 ms faster than
M-STOP. OFF: 50 ms
slower.
POWER ON: H
POWER OFF: Hi-Z
Models without external
display: Output "L".
Processing During Processing During
Non-Operation
"L ("Hi-Z" in 10 sec.
Hi-Z
after Power OFF).
L
H
H
Hi-Z
Hi-Z
L
L
Hi-Z
Hi-Z
"H ("Hi-Z" in 10 sec.
Hi-Z
after power OFF).
L
L
STBY

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