Pioneer DEH-P300 Service Manual - Page 57

clamp, asens, bsens

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DEH-P300,P3000,P200 30 Pin No. 64 65 66 67 68 69 70 71 72 73 74 75 76,77 78 79 80 81 82 83 84 85 86 87 88 89-91 92 93 94 95 96 97 98 99 100 *PD4989A 31 Pin Name I/O clamp I xsck O XSI I XSO O XA0 O xrst O xstb O VCAOUT O SUBMUT O TEST I SL I MODEL1 I NC EJTSNS I DSCSNS I VDSENS I TEMP I (VDD) (VDD) (GND) RX I TX O GND ldet I NC asens I bsens I TUNPDI I KEYDT I DPDT O TUNPCK O TUNPDO O TUNPCE O PEE O Function and Operation CD disc clamp sense input CD LSI clock output CD LSI data input CD LSI data output CD LSI command/data control output CD LSI reset output CD LSI strobe output Sub woofer electronic volume control output Sub woofer mute output Test terminal Tuner signal level input Model select input Not used CD disc EJECT position detect CD disc detect input CD VD over voltage / short-circuit sense input CD temperature sense input (CD) A/D converter power supply terminal A/D converter reference voltage terminal A/D converter GND IP BUS data input IP BUS data output GND RDS PLL lock sense input Not used ACC power sense input Back up power sense input PLL IC data input Key data input Display data output PLL IC clock output PLL IC data output PLL IC chip enable Beep tone output 1 IC's marked by* are MOS type. Be careful in handling them because they are very 100 liable to be damaged by electrostatic induction. 50 81 80 51 57

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57
DEH-P300,P3000,P200
IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
*PD4989A
Pin No.
Pin Name
I/O
Function and Operation
64
clamp
I
CD disc
clamp sense input
65
xsck
O
CD LSI clock output
66
XSI
I
CD LSI data input
67
XSO
O
CD LSI data output
68
XA0
O
CD LSI command/data control output
69
xrst
O
CD LSI reset output
70
xstb
O
CD LSI strobe output
71
VCAOUT
O
Sub woofer electronic volume control output
72
SUBMUT
O
Sub woofer mute output
73
TEST
I
Test terminal
74
SL
I
Tuner signal level input
75
MODEL1
I
Model select input
76,77
NC
Not used
78
EJTSNS
I
CD disc EJECT position detect
79
DSCSNS
I
CD disc detect input
80
VDSENS
I
CD VD over voltage / short-circuit sense input
81
TEMP
I
CD temperature sense input (CD)
82
(VDD)
A/D converter power supply terminal
83
(VDD)
A/D converter reference voltage terminal
84
(GND)
A/D converter GND
85
RX
I
IP BUS data input
86
TX
O
IP BUS data output
87
GND
GND
88
ldet
I
RDS PLL lock sense input
89–91
NC
Not used
92
asens
I
ACC power sense input
93
bsens
I
Back up power sense input
94
TUNPDI
I
PLL IC data input
95
KEYDT
I
Key data input
96
DPDT
O
Display data output
97
TUNPCK
O
PLL IC clock output
98
TUNPDO
O
PLL IC data output
99
TUNPCE
O
PLL IC chip enable
100
PEE
O
Beep tone output
30
31
50
51
80
81
100
1