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3-6. SY1 CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY1 circuit board, refer to the block diagram. The configuration of the SY1 circuit board
centers around a 8-bit microprocessor (IC301).
The 8-bit microprocessor handles the following functions.
1. Operation key input, 2. Mode LCD display, 3. Clock control, 4. Power ON/OFF, 5. Storobe charge control
Signal
Pin
1
CHG VOL
GND
2~3
SCAN IN 0~3
4~7
8
AVDD
9
AVREF
TARRY LED
10
GND
11
VSS
12
13~19
NOT USED
20
AVREF ON
21
GND
22
CHG ON
23~25
COM1~COM3
26
NOT USED
27
BIAS
28~30
VLC0~VLC2
31
VSS
32~51
S1~S20
52~56
NOT USED
57~59
SCAN IN 4~6
60
DC IN
61~63
NOT USED
64
WAKE UP
65
NOT USED
66
MECHA SW
67
NOT USED
68
GND
69
STROBE SW
70
PA ON
71
P ON
72
MIC JACK
73
GND
74
AV JACK
75
SI
76
SO
77
SCK
IC
78
79
XOUT
80
XIN
81
VDD
82
XCIN
83
XCOUT
I/O
I
Strobe charge voltage input (analog input)
-
GND
Key matrix input
I
A/D converter analog power terminal
-
I
A/D converter standard voltage input terminal
Remote control LED
O
GND
-
GND
-
-
-
O
A/D standard voltage ON/OFF signal
GND
-
Flash charge ON/OFF signal
O
O
Mode LCD common signal output
-
-
-
LCD motor voltage supply terminal
-
LCD motor voltage terminal
-
GND
Mode LCD segment signal output
O
-
-
I
Key matrix input
DC adaptor insertion detection
I
-
-
I
Signal for detection of access condition to disc
-
-
Detection of disc insertion & cover open/close L : Disc insertion and cover close
I
-
-
-
GND
I
Strobe pop up detection
O
DC/DC converter (analog) ON/OFF signal
O
DC/DC converter ON/OFF signal
I
External microphone detection
GND
-
I
Video output cable connection detection signal
I
Serial communication data input (←ASIC)
O
Serial communication data output (→ASIC)
O
Serial communication clock output (→ASIC)
-
Connect to VSS
O
Main clock oscillation terminal (4 MHz)
Main clock oscillation terminal
I
-
Power supply terminal
I
Sub clock oscillation terminal (32.768 kHz)
O
Sub clock oscillation terminal
– 17 –
Outline
L : LED light
L : ON
H : ON
L : ON
H : Rotation
H : Pop up
H : ON
H : ON
H : Insert microphone
H : Connection
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