Microcomputer's Terminal Description - Kenwood KDC-V7090R Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

System µ-com: UPD703033GC052
Terminal description
Pin Function I/O
1 AM+B O
2 FM+B O
3 O
AFS
4 PLL-DATA I/O
5 PLL-CLK I/O
6 Evdd -
7 Evss -
8 N.C O
9 BEEP O
10 N.C O
11 PRE-MUTE L O
12 PRE-MUTE R O
13 IC2-SDA I/O
14 IC2-SCL O
15 N.C O
16 N.C O
17 N.C O
18 TEST -
19 P-MUTE O
20 P-STBY O
21 MUTE O
22 N.C O
23 N.C O
24 ACC-DET I
25 DIMMER I
26 SW5V O
27 EXT-AMP-CO O
28 P-CON O
29 ANT-CON O
30 P-ON O
31 I
RESET
32 XT1 I
33 XT2 -
34 REGC -
35 X2 -
36 X1 I
37 Vss -
38 Vdd -
39 CLKOUT O
40 N.C O
41 N.C O
42 TYPE0 I
43 TYPE1 I
44 TYPE2 I
45 N.C O
46 IC2TYPE0 I
Description
AM power terminal
FM power terminal
Switching terminal for noise detection
Data I/O terminal to F/E
CLK terminal to F/E
Positive power terminal
GND terminal
Open (not used)
BEEP output terminal
Open (not used)
IC2, IC5, CD mechanism, DATA line
IC2, IC5, CD mechanism, CLK line
Open (not used)
Open (not used)
Open (not used)
Test terminal
Power IC MUTE terminal
Power IC STBY terminal
MUTE termianl
Open (not used)
Open (not used)
ACC detection terminal
Small detection terminal
5 volt power terminal
External AMP control terminal (200ms)
Power control terminal
Antenna control terminal
SW14V control terminal
Reset IN terminal
Subclock terminal
Subclock terminal
Capacitor output terminal for regulator inside microprocessor
Main clock terminal
Main clock terminal
GND terminal
+B terminal
Internal system clock output
Open (not used)
Open (not used)
Destination selector port
Destination selector port
Destination selector port
Open (not used)
IC2 destination terminal
KDC-V7090R/Y
Processing Operation
H: During AM radio operation
H: During FM radio operation
H: During FM radio operation if with RDS, RBDS
L: During AF search, FM seek
H: During receive
L (during CD): when M MUTE L is L (low)
L during momentary power down
Fixed at H only during 2 zone
L (during CD): when M MUTE R is L (low)
L during momentary power down
Fixed at H only during 2 zone
L: During Power-OFF L: During All-OFF
L: During Tell-mute
Power IC ON: H. Power IC OFF: L. During All-OFF: H
ON: Open OFF: L
L: ACC H: No ACC
ON: L OFF: H
ON: L OFF: H
L 40ms: Bus boost OFF
L 70ms: Bus boost LOW
L 100ms: Bus boost HI
Power ON: H Power OFF: L
TUNER, TI ON: H Open if no ANT-CON
Power ON: H Power OFF: L
H: Normally H: During reset
Time count Operation during Power-OFF
Oscillates: During Power-ON
Oscillates stop: During Power-OFF, during
momentary power down
L: During default
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