Read Sony XDR-CD70DAB Service Manual online
27
XDR-CD70DAB
•
IC Pin Function Description
MAIN BOARD IC801 uPD78F0547GC (S)-UBT-A (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1, 2
SHIFT-A,
SHIFT-B
O
Oscillation frequency selection on/off control signal output terminal
3 to 9
NC
-
Not used
10
RESET
I
System reset signal input from the reset signal generator "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
11
XT2
O
Sub system clock output terminal (32.768 kHz)
12
XT1
I
Sub system clock input terminal (32.768 kHz)
13
FLMDO
I
Internal flash memory data writing mode control signal input terminal
14
EXCLK
O
Main system clock output terminal (8 MHz)
15
X1
I
Main system clock input terminal (8 MHz)
16
REGC
-
External capacitor connection terminal for regulator
17
VSS
-
Ground terminal
18
EVSS
-
Ground terminal
19
VDD
-
Power supply terminal (+3.3V)
20
EVDD
-
Power supply terminal (+3.3V)
21
LCD-SCL
O
Serial data transfer clock signal output to the liquid crystal display
22
LCD-SDA
O
Serial data output to the liquid crystal display
23
NC
-
Not used
24
O-C-ON
O
CD power on/off control signal output terminal "L": CD power on
25 to 33
NC
-
Not used
34
I-CD-OPEN
I
CD lid open/close detect switch input terminal "L": CD lid is closed, "H": CD lid is opened
35
O-BTCHK
O
Battery detection signal output terminal
36 to 39
NC
-
Not used
40
I-OFF/
ALRMRST
I
Front panel key input terminal (A/D input)
41
I-ACIN
I
AC in detect signal input terminal "H": AC in
42
O-NPNP
O
Buzzer power supply on/off control signal output terminal
43
O-C-RW
O
Data read/write selection signal output to the CD DSP
44
O-C-RSTX
O
System reset signal output to the CD DSP "L": reset
45
I-C-BUSY
I
Busy signal input from the CD DSP
46
I-C-SUBSYQ
I
Subcode Q data (80 bit serial) input from the CD DSP
47
NC
-
Not used
48
O-BUZ
O
Buzzer drive signal output terminal
49
NC
-
Not used
50
V-RXD/F-RXD
I
Serial data input from the DAB tuner mocule
51
V-TXD/F-TXD
O
Serial data output to the DAB tuner mocule
52
O-C-DAT
O
Serial data output to the CD DSP
53
I-C-DAT
I
Serial data input from the CD DSP
54
O-C-MCK
O
Serial data transfer clock signal output to the CD DSP
55 to 58
NC
-
Not used
59
AVREF
I
Reference voltage (+3.3V) input terminal
60
AVSS
-
Ground terminal
61 to 64
I-SW3 to I-SW0
I
Front panel key input terminal (A/D input)
65
I-BTCHK
I
Battery voltage detection input terminal
66
3.3V-CHK
I
Input terminal for DAB +3.3V power supply voltage detection
67 to 69
NC
-
Not used
70
RADIO SW
O
CD power on/off control signal output terminal "L": CD power on
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