13
CDX-CA900/CA900X
3-1. IC PIN DESCRIPTIONS
• IC501 MB90574CPMT-G-367-BNDE1 (SYSTEM CONTROL) (US, Canadian Model)
• IC501 MB90574CPMT-G-368-BNDE1 (SYSTEM CONTROL) (AEP, UK, E Model)
Pin No.
Pin Name
I/O
Pin Description
1
RF OK
I
Servo IC RFOK signal input from servo IC (IC1)
2
CD RST
O
Servo IC reset signal output to servo IC (IC1)
3
A0
O
Servo IC command/parameter identification signal output to servo IC (IC1)
Command transmission: “L”
4
STB
O
Servo IC data storob signal output to servo IC (IC1) Data latch: “L”
5
ATT
O
System mute control signal output
6
XTAL EN
O
Not used in this set.
7
LIMIT
I
CD mechanism limit switch signal input (SW3)
8
VCC
—
Power supply pin (+5 V)
9
AMP ATT
O
Power amp mute signal output to power amp (IC381)
10
E2PSIO
I/O
EEPROM data signal input/output with tuner unit (TUX201)
11
E2PCKO
O
EEPROM clock signal output to tuner unit (TUX201)
12
DOOR SW/FLS SI
I
Front panel open/close detection signal input/Flash write data signal input
13
FLS SO
O
Flash write data signal output
14
BUS ON
O
Bus on control signal output
15
BEEP
O
Beep signal output to power amp (IC381)
16
(NCO)
O
Not used. (Open)
17
UNISI
I
SONY bus data signal input
18
UNISO
O
SONY bus data signal output
19
UNICKO
O
SONY bus clock signal output
20, 21
(NCO)
O
Not used. (Open)
22
SYSRST
O
System reset signal output to bus interface (IC601)
23
(NCO)
O
Not used.
24
SIRCS
I
Remote control data signal input
25
TSI
I
Servo IC serial data signal input from servo IC (IC1)
26
TSO
O
Servo IC serial data signal output to servo IC (IC1)
27
TCKO
O
Servo IC serial clock signal output to servo IC (IC1)
28
PH1
I
CD mechanism PH1 detection signal input Not used in this set.
29
CD DSW
I
CD mechanism down switch signal input (SW4)
30
IN SW/PH2
I
CD mechanism disc-in switch signal input (SW1)
31
PH3
I
CD mechanism PH3 detection signal input Not used in this set.
O
CD mechanism loading motor control signal output
—
Ground pin
—
Capacitance pin of power stabilized
O
CD mechanism eject motor control signal output
O
Amp on signal output to power amp (IC381) “L”: OFF, “H”: ON
O
Electronic volume mute signal output to electronic volume (IC301) “L”: Mute
—
D/A converter VREF input (+5 V)
—
D/A converter ground pin
O
ADSO select switch output 1
O
ADSO select switch output 2
42
AVCC
—
Analog power supply pin (+5 V)
43
AVRH
—
A/D convert Vref+ input (+5 V)
44
AVRL
—
A/D convert Vref– input (0 V)
45
AVSS
—
Analog ground pin
46
KEYIN0
I
Key signal input
47
NC
O
Not used. (Open)
48
RC IN0
I
Rotary commander signal input from remote in jack (J651)
49
(NCO)
O
Not used. (Open)
50
QUALITY
I
Tuner noise detection signal input (E model)
SECTION 3
DIAGRAMS
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