Pioneer KEH-P4020R, Service Manual

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38
Format Meaning
C C MOS
N N Channel open drain
Pin No. Pin Name I/O Format Function and Operation
1 SD I SD signal input
2 ST I FM stereo input
3 ADPW O C A/D converter power supply control output
4 AVSS GND
5 MUTE O C System mute output
6 NC Not used
7 AVREF1 I A/D converter reference voltage terminal
8 KYDT I Display data input
9 DPDT O C Key data output
10 NC Not used
11 TUNPDI I PLL IC data input
12 TUNPDO O C PLL IC data output
13 TUNPCK O C PLL IC clock output
14 TUNPCE O C PLL IC chip enable output
15 TMUTE O C Tuner mute output
16-18 NC Not used
19 VST O C Strobe pulse output for electronic volume
20 VDT O C Data output for electronic volume
21 VCK O C Clock output for electronic volume
22 CM O C Cassette mechanism capstan motor control output
23 SC2 O C Cassette mechanism sub motor control output 2
24
F/R
O C Cassette mechanism tape direction output
25 PLAY O C Cassette mechanism MS gain select output
26 RIMUTE O C Tape mute output
27 SC1 O C Cassette mechanism sub motor control output 1
28
STBY
O C Cassette mechanism drive IC control output
29 MSIN I Cassette mechanism MS sense input
30
LOADSW
I Cassette mechanism loading switch input
31 POS I Cassette mechanism position sense input
32 NES I Cassette mechanism normal sense input
33 VSS GND
34 NC Not used
35
FM/AM
O C "FM/AM band select pin ""H"" : FM ""L"" : AM"
36,37 NC Not used
38 SWVDD O N Grille chip enable output
39
EJECTS
I N Eject key input
40 LOCL O C Local L output
41 LOCH O C Local H output
42
CURRQ
O C Tuner voltage FIX output
43 FLAPILM O C Flap illumination output
44 ILMPW O C Illumination power supply control output
45 PEE O C Beep tone output
46 TUNPCE2 O C EEPROM chip enable output
47 RDS57K I RDS 57kHz pulse count input
48 SDBW I SD input at NF
49 PCL O C Clock adjustment output
50
RDST
O C RDS reset output
51 RECEIVE O C RDS receive output
52
RDSLK
I RDS LK input
53 SYSPW O C System power output
54 B.REM O C System power ON/OFF output
55 TELIN I HANDS FREE/Cellular mute input
56 TX O C IP BUS data output
57 RX I IP BUS data input
58 ASENBO O C Slave power supply control output
59 IPPW O C Power supply control output for IP BUS interface IC
60
RESET
I Reset input
61
LDET
I PLL lock detect input
62 RCK I RDS clock input
63
DSENS
I Grille detach sense input
64 RDT I RDS data input
65
ASENS
I ACC power sense input
66
BSENS
I Back up power sense input
67 NC Not used
68 VDD Power supply
69 X2 Crystal oscillator connection pin
70 X1 I Crystal oscillator connection pin
71 IC (GND)
72 XT2 Not used
73 TESTIN I Test program mode input
74 AVDD A/D converter power supply terminal
75 AVREF0 I A/D converter reference voltage terminal
76 SL I Signal level input
77 NC Not used
78 NL1 I RDS noise level input 1
79 CSENS I Flap open/close sense input
80 NL2DT I RDS noise level input 2
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Pin Functions(000974060)