Sony CDX-M8800 / CDX-M8805X Service Manual ▷ View 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
18
CDX-M8800/M8805X
Pin No.
Pin Name
I/O
Pin Description
52
NC
O
Not used. (Open)
53
MOTOR ON
O
Front panel motor drive ON signal output
54
CLOSE-SW
I
Front panel close switch signal input
55
OPEN-SW
I
Front panel open switch signal input
56
I_DET
I
Motor current detect input
57
MOT–
O
Front panel open/close control signal output
58
MOT+
O
Front panel open/close control signal output
59
CD_ON
I
CD servo ON signal input
60
VCC2
—
Power supply pin (+5V)
61
RESET OUT
O
Display CPU reset signal output
62
VSS
—
Ground
63
TEST IN
I
Test mode setting detect signal input
64
BUS_ON
O
BUS ON control signal output
65
SYSRST
O
System reset signal output
66
BUS/AUX
O
BUS/AUX select control signal output
67
NC
O
Not used. (Open)
68
ACC_IN
I
Accessory key ON detect signal input
69
ILL_IN
I
Illumination line detect signal input
70
RC_IN1
I
Rotary commander signal input 1
71
CDM_ON
I
CD drive power ON signal input
72
NC
O
Not used. (Open)
73
TU ATT-IN
I
Tuner mute condition signal input
74
NC
O
Not used. (Open)
75
NC
O
Not used. (Open)
76
Z_ATT
I
CD Z-MUTE signal input
77
EJECT-OK
O
CD EJECT-OK signal output
78
OPEN_REQ
I
CD OPEN REQ signal input
79
TEMP-TR
I
Temperature detect input
80
QUALITY
I
Tuner noise detect signal input
81
FP-I_DET
I
Front panel motor current detect signal input
82
VSM
I
S-meter signal input
83
SA_IN
I
Spectrum analyzer data input
84
KEYIN1
I
Key signal input 1
85
KEYIN0
I
Key signal input 0
86
RCIN0
I
Rotary commander signal input 0
87
KEY_ACK2
I
Key acknowledge detect signal input 2
88
KEY_ACK0
I
Key acknowledge detect signal input 0
89
KEY_ACK1
I
Key acknowledge detect signal input 1
90
OPEN_KEY
I
Open key detect signal input
91
RAM_BU
I
RAM back up signal input
92
FLD_ON
O
FL driver power supply ON/OFF signal output
93
FL_ON
O
FL power supply ON/OFF signal
94
AVSS
—
Ground
95
DISP_CE
O
Display CPU chip enable output
96
VREF
—
A/D converter reference voltage (+5V)
97
AVCC
—
Power supply pin (+5V)
98
DISP SI/RX
I
Display CPU BUS data input
99
DISP SO/TX
O
Display CPU BUS data output
100
DISP CKO
O
Display CPU BUS clock output
19
CDX-M8800/M8805X
• IC2 M30823MH-081GP (DISPLAY SYSTEM CONTROL) (DISPLAY Board)
Pin No.
Pin Name
I/O
Pin Description
1
SYS_CE
I
Main chip enable signal input
2
NC
O
Not used. (Open)
3
FL_DAT3
O
FL serial data output
4
NC
O
Not used. (Open)
5
FL_CLK_IN
I
FL serial clock input
6
BYTE
I
L fixed terminal
7
CNVSS
I
Flash write signal input
8
PLL_LPF
O
Not used. (Open)
9
PLL_GND
I
Ground
10
RESET
I
CPU reset signal input
11
XOUT
O
Main clock output (8MHz)
12
VSS
—
Ground
13
XIN
I
Main clock input (8MHz)
14
VCC
—
Power supply pin (+5V)
15
NMI
I
Non maskable interrupt signal input
16
NC
O
Not used. (Open)
17
NC
I
GCP interrupt signal input (Connecting to pin 20)
18
NC
O
Not used. (Open)
19
NC
O
Not used. (Open)
20
NC
O
GCP interrupt signal output (Connecting to pin 17)
21
LAT
O
FL data latch signal output
22
BK
O
FL BK signal output
23
GCP2
O
FL GCP2 output
24
NC
O
Not used. (Open)
25
GCP1
O
FL GCP1 output
26
NC
O
Not used. (Open)
27
GCP4
O
FL GCP4 output
28
GCP3
O
FL GCP3 output
29
SYS_SO
O
System serial data output
30
SYS_SI
I
System serial data input
31
SYS_CLK
O
System serial clock input
32
NC
O
Not used. (Open)
33
FL_DAT1
O
FL serial data output
34
NC
O
Not used. (Open)
35
FL_CLK
O
FL serial clock output
36
LCD_CE
O
LCD driver chip enble signal output
37
LCD_INH
O
LCD driver inhibit signal output
38
NC
O
Not used. (Open)
39
HOLD
I
L fixed terminal
40 – 43
NC
O
Not used. (Open)
44
WRI/WR
I
H fixed terminal
45 – 59
NC
O
Not used. (Open)
60
VCC
—
Power supply pin (+5V)
61
NC
O
Not used. (Open)
62
VSS
—
Ground
63 – 67
NC
O
Not used. (Open)
68
LED_SW10
O
LED driver signal output
69
LED_SW9
O
LED driver signal output
70
LED_SW8
O
LED driver signal output
71
LED_SW7
O
LED driver signal output
72
LED_SW6
O
LED driver signal output
73
LED_SW5
O
LED driver signal output
20
CDX-M8800/M8805X
Pin No.
Pin Name
I/O
Pin Description
74
LED_SW4
O
LED driver signal output
75
LED_SW3
O
LED driver signal output
76 – 93
NC
O
Not used. (Open)
94
AVSS
—
Ground
95
NC
O
Not used. (Open)
96
VREF
—
Power supply pin (+5V)
97
AVCC
—
Power supply pin (+5V)
98
RXD1
—
Not used. (Open)
99
FL_DATA2
O
FL serial data output
100
FL_CLK_IN
I
FL serial clock input
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