Read Sony CDX-L350 / CDX-L450X / CDX-L470X / CXS-2100 Service Manual online
17
CDX-L350/L450X/L470X
4-1. IC PIN DESCRIPTION
• IC801 µPD780024AGK-B26-9ET (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Pin Description
1
D SW
I
Down switch detection input
2
IN SW
I
Disc in switch detection input
3
PH3
I
PH3 detection input (Not used in this set)
4
LM LD
O
Loading motor drive output (Loading)
5
LM EJ
O
Loading motor drive output (Eject)
6
A ATT
O
Power amplifier mute control output
7
ATT
O
Line out mute control output
8
BEEP
O
BEEP output
9
VSSO
—
Ground
10
VDDO
—
Power supply pin (+5 V)
11
VOL CLK
O
Electric volume clock output
12
VOL DO
O
Electric volume data out output
13
VOL CE
O
Electric volume chip enable output
14
AM ON
O
Tuner AM power supply control output
15
FM ON
O
Tuner FM power supply control output
16
NOSE
I
Front panel attachment detection input
17
PLL DI
I
PLL IC data input
18
LCD DO
O
LCD data output
19
LCD CE
O
LCD chip enable output
20
LCD CLK
O
LCD clock output
21
PLL CLK
O
PLL IC clock output
22
PLL DO
O
PLL IC data output
23
PLL CE
O
PLL IC chip enable output
24
VDD1
—
Power supply pin (+5 V)
25
AVSS
—
Ground
26
ST IND
I
FM STEREO detection input
27
FUN SEL
I
Function select input
28
S METER
I
S meter signal input
29, 30
KEY0, 1
I
A/D key input 0, 1
31
TEL ATT
I
Attenuator signal input
32
DST SEL
I
Destination select input
33
TEST
I
Force test mode input
34
AVREF
—
A/D converter power supply pin (+5 V)
35
AVDD
—
A/D converter power supply pin (+5 V)
36
RESET
I
Reset input
37
XT2
O
Sub clock output (32.768 kHz)
38
XT1
I
Sub clock input (32.768 kHz)
39
IC
—
Connect to Ground in this set.
40
X2
O
Master clock output (8.38 MHz)
41
X1
I
Master clock input (8.38 MHz)
42
VSS1
—
Ground
43
KEY ACK
I
Key acknowledge detection input
44
SIRCS
I
SIRCS input
45
SELF SW
I
Self switch detection input
46
BU IN
I
Backup power supply detection input
47
AD ON
O
Key power supply control output
48
ILL ON
O
Illumination power supply control output
49
AMP ON
O
Amplifier remote power supply control output
50
CDM ON
O
CD mechanism deck power supply control output
51
XCD ON
O
CD DSP IC 16 MHz X’tal ON/OFF control output
52
TU ON
O
Tuner power supply control output
SECTION 4
DIAGRAMS
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