Pioneer KEH-P4020R Service Manual page 38

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