Microcomputer's Terminal Description - Kenwood KDC-C521FM Service Manual

KDC-C471FM/C521FM
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MICROCOMPUTER'S TERMINAL DESCRIPTION

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MECHANISM MICROCOMPUTER : 784214AGC-165 (X32 : IC7)
Pin No. Pin Name
1 NOR/RW
2 TSTB
3 P-CON
4 FOK
5 XTALEN
6 RST
7 SAO
8 SSTB
9 VDD
10 X2
11 X1
12 VSS
13 XT2
14 XT1
15 RESET
16 FOGUP
17 MGSW
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18 EJSW
19 COMMSW
20 PACK
21 CH-CON
22 BUDET
23 AVDD
24 AVREF0
25 HOT
26 LPS
27 LOESW
28 LIMSW
29 TOFF
30 ADJSEL
31 TBANK
32 SIM2
33 AVSS
34 LPSCO
35 AMUTE
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36 AVREF1
37 SDI
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38 SDO
39 SCK
6
I/O Description
O CD-DA/CD-RW Switching
O CD-TEXT parameter strobe
O P-CON output
I Focus OK input
O Servo IC oscillation stop control
O Servo IC reset terminal
O Servo IC command/parameter setting terminal
O Servo IC command/parameter setting strobe terminal
- Positive power supply connection terminal
- Main clock resonator connection terminal 2
I Main clock resonator connection terminal 1
- Ground connection terminal
- Sub clock resonator connection terminal 2
I Sub clock resonator connection terminal 1
I System reset input
I Vibration detect input
I Magazine switch input
I Eject switch input
I 5-line communication old/new switch input
I Text data pack synchronous signal input
I Changer control input
I Momentary power down detection input
- A/D converter positive power supply connection terminal
I A/D converter reference voltage input
I Rise in temperature detection input
I LPS Mechanical deck position detection input
I Loading complete switch input
I Limit switch input
I Tracking OFF mode terminal
I Servo automatic adjustment ON/OFF terminal
I Tracking gain switching mode terminal
I Destination input 2
- A/D, D/A converter ground connection terminal
O LPS A/D converter reference power control output
O Audio mute output
I D/A converter reference voltage input
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y
I Servo IC communication serial data input
i
O Servo IC communication serial data output
O Servo IC communication serial clock output
8
Not used (N.C.)
Not used (N.C.)
"Hi" : Focus OK
"Hi" : Oscillation stop
"Lo" : Reset
"Hi" : Parameter setting, "Lo" : Address resister setting
"Hi"→"Lo" : Serial data latch
Connected to D 5V lines
Connected to GND lines
Not used (N.C.)
Not used (connected to GND lines)
"Lo" : System reset
"Hi" : Vibration detect
"Hi" : Magazine in
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"Hi" : Eject switch ON
"Hi" : New communication, "Lo" : Old communication
"Hi"→"Lo" : The head of the pack data
"Hi" : Standby mode, "Lo" : Operation mode
"Hi" : When momentary power down detected or
BU OFF "Lo" : BU ON
Connected to D 5V lines
Connected to PON 5V lines
"Lo" : Loading complete
"Lo" : Pickup most inner position
Not used (pull down to GND lines)
Not used (pull down to GND lines)
Not used (pull down to GND lines)
Not used (pull down to GND lines)
Connected to GND lines
Not used (N.C.)
"Lo" : Audio mute ON
Connected to D 5V lines
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2 9 9 4 2 8
Processing Operation
1 5 0 5 8 2 9 9 4
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9 9
2 8 9 9