Read Sony CDX-M8800 / CDX-M8805X Service Manual online
17
CDX-M8800/M8805X
3-1. IC PIN DESCRIPTIONS
• IC303 M30624MGP-124GP (SYSTEM CONTROL) (MAIN Board (3/4))
Pin No.
Pin Name
I/O
Pin Description
1
SIRCS
I
Remote control data input
2
FP_CTRL
—
Not used. (Open)
3
NC
O
Not used. (Open)
4
NC
I
Not used. (Open)
5
NC
O
Not used. (Open)
6
BYTE
I
L fixed terminal
7
CNVSS
I
Flash write-in signal input
8
XIN
I
Sub clock input (32kHz)
9
XOUT
O
Sub clock output (32kHz)
10
RESET
I
CPU reset signal input
11
OSCOUT
O
Main clock output (6MHz)
12
VSS
—
Ground
13
OSCIN
I
Main clock input (6MHz)
14
VCC1
—
Power supply pin (+5V)
15
NMI
I
Non maskable interrupt signal input
16
NC
O
Not used. (Open)
17
DAVN
I
RDS data acquisition detect signal input
18
BU_IN
I
Back-up power detect signal input
19
NS_MASK
O
RDS NS MASK signal output
20
BEEP
O
Beep signal output
21
FLW_IN
I
OSC frequency shift signal for DC/DC conv.
22
FLW_OUT
O
OSC frequency shift signal for DC/DC conv.
23
SA_CLK
O
Spectrum analyzer clock signal output
24
TELATT
I
telephone mute detect signal input
25
ATT
O
Mute signal output
26
VOLATT
O
Electronic volume mute signal output
27
I2C_CKO
O
Tuner/E-volume BUS clock output
28
I2C_SIO
O
Tuner/E-volume BUS data output
29
UNI_SO
O
BUS CONTROL data output
30
UNI_SI
I
BUS CONTROL data input
31
UNI_CKO
O
BUS CONTROL clock output
32
TUNERATT
O
Tuner mute signal output
33
EESIO
I/O
EEPROM data input/output
34
EECKO
O
EEPROM clock output
35
NC
O
Not used. (Open)
36
NC
O
Not used. (Open)
37
NC
O
Not used. (Open)
38
NC
O
Not used. (Open)
39
HOLD
I
Flash write-in signal input
40
AMP_DIAG
I
Amplifier diagnosis signal input
41
AMP_STB
O
Amplifier strobe signal output
42
AMP_ON
O
Not used. (Open)
43
TUNER_ON
O
Not used. (Open)
44
WRI/WR
I
Connected to VCC (+5V)
45
NC
O
Not used. (Open)
46
NC
O
Not used. (Open)
47
NC
O
Not used. (Open)
48
NC
O
Not used. (Open)
49
NC
I
Not used. (Open)
50
DST_SEL1
I
Destination select signal input
51
DST_SEL2
I
Destination select signal input
SECTION 3
DIAGRAMS
Click on the first or last page to see other CDX-M8800 / CDX-M8805X service manuals if exist.