Sony CDX-CA900 Service Manual page 16

CDX-CA900/CA900X
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3 7 63 1515 0
• IC701 HD64F2398A04FWV (SUB SYSTEM CONTROL)
Pin No. Pin Name
1 PG3
2 PG4
3 VSS
4 NC
5 VCC
6 to 9 PC0 to PC3
10 VSS
11 to 14 PC4 to PC7
15 to 18 PB0 to PB3
19 VSS
20 to 23 PB4 to PB7
24 to 27 PA0 to PA3
28 VSS
29 to 32 PA4/IRQ4 to PA7/IRQ7
33 SA EN
34 BU IN
35, 36 VSS
37 P65/IRQ1
38 BUS ON
39 VCC
40 to 43 PE0 to PE3
44 VSS
45 to 48 PE4 to PE7
TE
L 13942296513
49 —
50 LINK OFF
51 PD2
52 ILL ON
53 VSS
54, 55 —
56 PD6
57 BOOT
58 VCC
59 NC
60 TX/LCD DATA
61 SP SI
62 RX/DOOR SW
63 L RST
64 LCD SCK
65 VSS
66 LCD CEI
67, 68 VSS
69 to 71 (NCO)
72 to 79 P27 to P20
80 VCL
81 RST
82 NMI
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83 STBY (H)
84 VCC
85 XTAL
.
86 EXTAL
87 VSS
88 PF7
16
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I/O
O Spectrum analyzer data clock signal output to electronic volume (IC301)
O Not used. (Open)
— Ground pin
— Not used. (Open)
— Power supply pin (+5 V)
O Not used. (Open)
— Ground pin
O Not used. (Open)
O Not used. (Open)
— Ground pin
O Not used. (Open)
O Not used. (Open)
— Ground pin
O Not used. (Open)
I Spectrum analyzer enable signal input from system control (IC501)
I Back up power signal input from bus interface (IC601)
— Ground pin
O Not used. (Open)
I Bus on signal input from system control (IC501)
— Power supply pin (+5 V)
O Not used. (Open)
— Ground pin
O Not used. (Open)
O Not used. (Open)
O Link off signal output
O Not used. (Open)
O Illumination power control signal output
— Ground pin
O Not used. (Open)
O Not used. (Open)
I Flash write mode detection signal input from system control (IC501)
— Power supply pin (+5 V)
O Not used. (Open)
O Flash write data signal output/LCD driver data signal output
O Not used. (Open)
I Flash write data signal input/Door switch detection signal input
O Reset signal output
O LCD driver clock signal output
— Ground pin
O LCD driver chip enable signal output
— Ground pin
O Not used. (Open)
O Not used. (Open)
— Connect to external capacitor
I Reset signal input
I Non-maskable interruption signal input
— Standby mode pin
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— Power supply pin (+5 V)
y
— Crystal oscillator connection pin (18.432 MHz)
i
— Crystal oscillator connection pin (18.432 MHz)
— Ground pin
O Not used. (Open)
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2 9
8
Pin Description
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9