Read Sony XDR-S56DBP Service Manual online
XDR-S56DBP
11
• IC Pin Function Description
MICRO COMPUTER BOARD IC501
PD78F0547AGC (S)-GAD-AX (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
BATT OFF
I
Battery off detect signal input (forced radio off)
2
LCD CONT
O
LCD power supply control signal output “H”: on, “L”: off
3
LIGHT
O
LCD back light control signal output “H”: on, “L”: off
4 to 9
NC
O
Not used. (Open)
10
RESET
I
Reset signal input “L”: reset
11
XT2
I
Sub clock oscillation crystal connect pin (32.768 kHz)
12
XT1
O
Sub clock oscillation crystal connect pin (32.768 kHz)
13
FLMDO
I
Flash memory programing mode pull pin
14
EXCLK
I
Flash write clock signal input
15
XI
I
Flash write clock signal input
16
REGC
I
Regulator output stabilized capacitance connect pin (Connect to 0.47
F.)
17
VSS
—
Ground pin
18
EVSS
—
Ground pin
19
VDD
—
Power supply pin
20
EVDD
—
Power supply pin
21 to 24
KS0 to KS3
O
Key source signal output 0 to 3
25
HOLD
I
Hold switch signal input “H”: on, “L”: off
26 to 29
NC
—
Not used. (Open)
30 to 33
KR7 to KR4
I
Key return signal input 7 to 4
34 to 36
NC
O
Not used. (Open)
37
AMP SW
O
Audio amplifi er operation switch signal output “H”: on, “L”: off
38
RADIO SW
O
DAB module operation switch signal output “H”: on, “L”: off
39
MUTE
O
Mute signal output “L”: on, “H”: off
40
AC CHK
I
AC adapter connection detect signal input “H”: AC, “L”: DC
41
INTP2
I
Pull down pin (10 k
)
42 to 45
NC
—
Not used. (Open)
46
VDET1
I
Radio off voltage detect signal input “L”: Radio off
47, 48
NC
O
Not used. (Open)
49
BEEP
O
Beep signal output
50
F-RXD
I
UART data signal input
51
F-TXD
O
UART data signal output
52
NC
O
Not used. (Open)
53
RXD0
I
Not used. (Open)
54
TXD0
O
Not used. (Open)
55, 56
NC
O
Not used. (Open)
57
SHIMUKE2
I
Not used. (Pull down)
58
SHIMUKE1
I
Destination select signal input (Clock)
“L”: 12H (AEP model), “H”: 24H (UK and Australian models)
“L”: 12H (AEP model), “H”: 24H (UK and Australian models)
59
AVREF
I
A/D converter reference voltage signal input
60
AVSS
—
Ground pin
61
VDET2
I
Reducing voltage detect signal input
62
NC
O
Not used. (Open)
63
1.2V SW
O
DAB module switch signal output
64 to 74
NC
O
Not used. (Open)
75
LCD CS
O
LCD serial communication chip select signal output
76
LCD SO
O
LCD serial communication data signal output
77
NC
—
Not used. (Open)
78
LCD CLK
O
LCD serial communication clock signal output
79
NC
O
Not used. (Open)
80
NC
O
Not used. (Open) Sub clock signal output (Test mode)
Click on the first or last page to see other XDR-S56DBP service manuals if exist.