Kenwood KDC-7080R/RY, Service Manual

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KDC-7080R/RY/RV/RYV
3
MICROCOMPUTER’S DESCRIPTION
System
µ
-com : UPD784217GC (X25-)
Terminal description
No. Pin name Function I/O Description Processing Operation
1 P120/RTP0 CHCON1 O Changer 1 control Active : Hi
2 P121/RTP1 CH_MUTE I Changer muting input MUTE Requested : Hi
3 P122/RTP2 REQH O Handshake request to changers Active : Lo
4 P123/RTP3 ILL_ON O Illumination output Active : Hi
5 P124/RTP4 NC O Open
6 P125/RTP5 CD_SW2 I 12cm DISC detection ON : Lo
7 P126/RTP6 CD_SW1 I Loading detection ON : Lo
8 P127/RTP7 NC O Open
9 Vdd Vdd - Positive power supply
10 X2 X2 - Main clock connection
11 X1 X1 - Main clock connection
12 Vss Vss - GND
13 XT2 XT2 - Sub clock connection
14 XT1 XT1 - Sub clock connection
15 RESET RESET I Reset input Active : Lo
16 P00/INTP0 CH_RST O Changer reset output Active : Lo
17 P01/INTP1 R_CLK I RDS clock input
18 P02/INTP2/NMI REQC I Handshake request from changer Active : Lo
19 P03/INTP3 N C I/O
20 P04/INTP4 N C I/O
21 P05/INTP5 N C I/O
22 P06/INTP6 SC_REQ I Handshake request from panel
µ
-com
23 AVdd AVdd - A/D analog power supply
24 AVref0 AVref - A/D reference voltage input
25 P10/ANI0 PHONE I PHONE detection terminal
1V or less : PHONE
2.5V or more : NAVI MUTE
26 P11/ANI1 SRM_SW1 I SRM position detection Open : Hi
27 P12/ANI2 NOISE I FM noise detection Analog input
28 P13/ANI3 SMETER I FM signal meter detection Analog input
29 P14/ANI4 IF_MODE I K2I IF selector Wide : Hi / Narrow : Lo
30 P15/ANI5 NC I GND
31 P16/ANI6 M_MUTE_R I Mute request from meshanism Mute requested : Lo
32 P17/ANI7 M_MUTE_L I Mute request from meshanism Mute requested : Lo
33 AVss AVss - A/D GND
34 P130/ANO0 EXT_AMP O EXT_AMP control
35 P131/ANO1 M_RST O Reset output to mechanism Reset : Lo
36 AVref1 - D/A reference voltage input
37 P70/RxD2/SI2 DATAC I Data line from changer
38 P71/TxD2/SO2 DATAH O Data line to changer
39 P72/ASCK2/SCK2 CH_CLK I/O Clock line from/to changer
40 P20/RxD1/SI1 L_DATAL/SC_DATA I Data line from LCD driver
41 P21/TxD1/SO1 L_DATAS/MC_DATA O Data line to LCD driver
42 P22/ASCK1/SCK1 L_CLK/MC_CLK I/O Clock line to LCD driver
43 P23/PCL M_STOP I/O Stop request to mechanism Stop Requested : Lo
44 P24/BUZ BEEP O Beep output Active : Hi
45 P25/SI0 PLL_CE O CE output to PLL
46 P26/SO0 PLL_DATA I/O Data in/out with PLL
47 P27/SCK0 PLL_CLK O Clock output to PLL
48 P80/A0 CD_SW3 I Switch detection ON : Hi
49 P81/A1 LO/EJ O Loading/Eject control Loading : Lo / Eject : Hi