Read Sony ST-SDB900 Service Manual online
18
18
ST-SDB900
ST-SDB900
Pin No.
Pin Name
I/O
Description
48
AC_STOP
I
AC STOP Detection signal input
49
MD0
—
Mode setting (Fixed at “H”)
50
MD1
—
Mode setting (Fixed at “H”)
51
MD2
—
Mode setting (Fixed at “L”)
52
RDS-INT
I
RDS clock interruput signal input
53
RDS-DATA
I
RDS data input
54
SIRCS
I
Sircs code input to remote commander
55
P85
I
Not used (Connected to ground)
56
X_NONSEL
I
Not used
57
P87
I
Not used (Connected to ground)
58
P90
I
Not used (Connected to ground)
59
FL_DATA
O
Serial data output to MLP9208
60
FL_CLK
O
Serial clock output to MLP9209
61
FL_RST
O
Reset signal output to MLP9208
62
FL_CS0
O
Cip select signal output to MLP9209
63
FL_CS1
O
Cip select signal output to MLP9210
64
SIRCS2
I
Sircs code input to remote commander
65
P97
I
Not used (Connected to ground)
66
JOG_P
I
Tuning/Select dial CW signal input
67
JOG_M
I
Tuning/Select dial CCW signal input
68
PA2
I
Not used (Connected to ground)
69
PA3
I
Not used (Connected to ground)
70
P50
I
Not used (Connected to ground)
71
P51
I
Not used (Connected to ground)
72
P52
I
Not used (Connected to ground)
73
TUNED
I
Tuned detection inout for auto tuning
74
STEREO
I
Stereo detection inout
75
TUN_MUTING
O
Tuner muting signal output
76
TUN_DIO2
I
Serial data input from tuner
77
RSTX
I
Sysem reset signal input
78
SLATCH
O
Latch signal outout to tuner
79
X1A
—
Not used (open)
80
X0A
—
Not used (Connected to ground)
81
VSS
—
Ground
82
X0
—
Connected to the crystal oscillator (16MHz)
83
X1
—
Connected to the crystal oscillator (16MHz)
84
VCC3
—
Not used (Connected to ground)
85
X_L_MUTING
O
Latch signal output to CPU
86
DABSEL
O
Latch signal input from CPU
87
P02
I
Not used (Connected to ground)
88
P03
I
Not used (Connected to ground)
89
P04
I
Not used (Connected to ground)
90
P05
I
Not used (Connected to ground)
91
P06
I
Not used (Connected to ground)
92
P07
I
Not used (Connected to ground)
93
P10
I
Not used (Connected to ground)
94
P11
I
Not used (Connected to ground)
• IC Pin Function Description
MAIN BOARD IC300 MB90478PF-G-184-BNDE1 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
MON0
O
Not used (open)
2
MON1
O
Not used (open)
3
MON2
O
Not used (open)
4
MON3
O
Not used (open)
5
P24
I
Not used (Connected to ground)
6
P25
I
Not used (Connected to ground)
7
P26
I
Not used (Connected to ground)
8
P27
I
Not used (Connected to ground)
9
P30
I
Not used (Connected to ground)
10
PWCONT2
I
Not used (Connected to ground)
11
VSS
—
Ground
12
PWCONT1
I
Not used (Connected to ground)
13
P33
I
Not used (Connected to ground)
14
TUN_DIO1
O
Serial data output to tuner unit
15
TUN_CLK
O
Serial clock output to tuner unit
16
P36
I
Not used (Connected to ground)
17
P37
I
Not used (Connected to ground)
18
P40
I
Not used (Connected to ground)
19
P41
I
Not used (Connected to ground)
20
P42
I
Not used (Connected to ground)
21
P43
I
Not used (Connected to ground)
22
P44
I
Not used (Connected to ground)
23
VCC5
—
Power supply (+3.3V)
24
P46
I
Not used (Connected to ground)
25
P47
I
Not used (Connected to ground)
26
BUSY
O
Busy signal output (Not used)
27
DAB_IO2
I
Serial data input from DAB module
28
DAB_IO1
O
Serial data output to DAB module
29
SCKO
I
UART baud rate clock input (1.8432MHz)
30
DAB_PWR
O
DAB module power(+3.3V) ON/OFF signal output to (H:on,L:off)
31
DAB-PWR5
O
DAB module power ON/OFF signal output to (H:on,L:off)
32
WP
O
Write protect signal output to EEPROM
33
SCL
O
Clock output to EEPROM
34
SDA
I/O
Data input/output to EEPROM
35
AVCC
—
Power supply (+3.3V)
36
AVRH
—
Referenc voltage input (connectrd to +3.3V)
37
AVSS
—
Ground
38
KEY_AD0
I
Key input 0
39
KEY_AD1
I
Key input 1
40
KEY_AD2
I
Key input 2
41
KEY_AD3
I
Key input 3
42
VSS
—
Ground
43
FM_SIG_OUT
I
FM signal intense input
44
X_DUAL
I
DAB band select input (L:Dual band,H:Band 3 only)
45
X_WITH_AMP
I
AMP select input (L:with amp,H:Tuner)
46
X_NOFMAM
I
FMAM /DAB select input (L:DAB only,H:DAB/FMAM)
47
P80
I
Not used (Connected to ground)
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