Pioneer KEH-P490, Service Manual

Page: 51 / 61

44
KEH-P490,P4900,P4950
-
Pin Functions(PE5086A)
Pin No. Pin Name I/O Format Function and Operation
1 ASENBO O C Slave power supply control output
2 NC Not used
3 ADPW O C A/D converter power
4 AVSS GND
5
swvdd
O C Grille power supply control output
6
st
I FM stereo input
7 AVREF1 D/A converter standard voltage
8 KYDT I Grille MicroComputer data input
9 DPDT O C Grille MicroComputer data output
10 NC Not used
11 TUNPD1 I PLL IC data input
12 TUNPD0 O C PLL IC data output
13 TUNPCK O C PLL IC clock output
14 TUNPCE O C PLL IC chip enable output
15
currrq
O C Tuner voltage FIX output
16 NC Not used
17 TX O C IP-BUS data output
18-12 NC Not used
22 VST O C Strobe pulse output for electronic volume
23 VCK O C Clock output for electronic volume
24 VDT O C Data output for electronic volume
25-28 NC Not used
29 FM O C FM power control output
30 AM O C AM power control output
31 CM O C Cassette mechanism capstan motor control output
32 NC Not used
33 VSS GND
34 SC2 O C Cassette mechanism sub motor control output
35 SC1 O C Cassette mechanism sub motor control output
36 MS I Cassette mechanism MS sense input
37
mcmute
I Cassette mechanism mute input
38
mtl
I Metal sense input
39 NC Not used
40
n
/R O C Normal reverse output
41 PLAY O C Tape MS filter select output
42
loadsw
I Tape loading input
43 POS I Cassette mechanism position sense input
44 RES I Cassette mechanism reverse end sense input
45 PEE O C Beep tone output
46 NES I Cassette mechanism forward end sense input
47 NC Not used
48 STBY O C Stand-by output
49-52 NC Not used
53 SD I SD input
54
mute
O C Mute output
55 SYSPW O C System power supply control output
56-59 NC Not used
60
reset
I Reset input
61 RX I IP-BUS data input
62 NC Not used
63
dsens
I Grille detach sense input
64 TELIN I Cellular mute input
65
asens
I ACC power sense input
66
bsens
I Back up power sense input
67 CLKIN I Clock sense input
68 VDD VDD
69 X2 O C Oscillator output
70 X1 I Oscillator input