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12
CDX-CA540X/CA590X
3-1. IC PIN DESCRIPTION
• IC801 µPD780076YGK-R24 (SYSTEM CONTROL) (MAIN Board)
Pin No.
Pin Name
I/O
Pin Description
1
D SW
I
Down switch detection signal input “L”: Down switch on
2
LM LD
O
Loading motor drive control signal output (Loading direction)
3
LM EJ
O
Loading motor drive control signal output (Eject direction)
4
ATT
O
Mute control signal output of audio signal line “H”: mute on
5
A ATT
O
Mute control signal output to power amp IC (IC101) “L”: amp mute on
6
PLL DI
I
Serial data signal input to PLL IC (IC601)
7
VOL ATT
O
Mute control signal output to Electric volume IC (IC401)
8
DOOR SW/IND
I
Door switch signal input Case of flipdown, sense to open condition of door “H”: open
9
VSS0
—
Ground pin
10
VDD0
—
Power supply pin
11
PLL CE
O
Chip enable signal output to PLL IC (IC601)
12
BEEP
O
Beep signal output of key beep, caution alarm to power amp IC (IC101)
13
SDAO
O
IIC data line signal output (control to electric volume IC (IC401))
14
SCLO
O
IIC clock line signal output (control to electric volume IC (IC401))
15
LCD CE
O
Chip enable control signal output to LCD driver IC (IC901)
16
LCD DO
O
Serial data signal output to LCD driver IC (IC901)
17
LCD CLK
O
Serial clock signal output to LCD driver IC (IC901)
18
BUS SI
I
SONY bus data signal input from bus interface IC (IC802)
19
BUS SO
O
SONY bus data signal output to bus interface IC (IC802)
20
BUS CLK
I
SONY bus clock signal input
21
BUS CLK GEN
O
SONY bus clock signal output
22
AM ON
O
AM select signal output
FM circuit power supply control output of tuner unit (TU601) “H”: FM on
23
FM ON
O
FM select signal output
FM circuit power supply control output of tuner unit (TU601) “H”: FM on
24
VDD1
—
Power supply pin
25
AVSS
—
Ground pin
Stereo signal input/monaural control signal output
26
ST IND
I/O
At forced monaural on: “L” output
At forced monaural off: input mode, stereo on for “L” input
27
SHIFT/PH1
I
Rotary commander shift key signal input
28
S METER
I
S meter signal input from tuner unit (TU601)
29, 30
KEY0, KEY1
I
A/D key signal input Input of A/D key matrix and front panel attachment decision.
31
R COM
I
Rotary commander AD level signal input
Sense to key voltage level of rotary commander
32
DST SEL
I
Destination select input from frequency select switch (SW803)
33
TEST
I
Test mode select signal input “L”: test mode
34
AVREF
—
Analog reference voltage pin
35
AD ON
O
LCD INHIBIT signal output
36
RESET
I
Reset signal input from reset IC (IC902) “H”: reset
37
XT2
—
Connect to sub clock (32.768 kHz)
38
XT1
—
Connect to sub clock (32.768 kHz)
39
IC
—
At on board writer: 12 V power supply pin (usually ground pin)
40
X2
—
Connect to crystal oscillator (8.38 MHz)
41
X1
—
Connect to crystal oscillator (8.38 MHz)
42
VSS1
—
Ground pin
43
KEY ACK
I
Key acknowledge signal input
44
SIRCS
I
Wireless remote control signal input from remote control receiver IC (IC951)
45
SELF SW
I
SELF switch detection signal input “L”: SELF switch on
46
BU IN
I
Backup power supply detection signal input
47
NOSE
I
Front panel attachment detection signal input from SW801 “L”: panel on
SECTION 3
DIAGRAMS
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