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