Sanyo VPC-AZ1EX Service Manual page 8

1-6. SY1 CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY1 circuit board, refer to the block diagram. The SY1 circuit board centers around a 8-bit
microprocessor (IC301), and controls camera system condition (mode).
The 8-bit microprocessor handles the following functions.
1. Operation key input, 2. Clock control and backup, 3. Power ON/OFF, 4. Storobe charge control, 5. Signal input and output for
zoom and lens control.
Pin Signal
SCAN OUT 0~3
1~4
5 P ON
PA ON
6
7
LCD ON
8 BL ON
9
VSS
VDD
10
11 SELF_LED
12 STBY_LED (GREEN)
13
STBY_LED (RED)
14 AVREF_ON
15 SI
16 SO
17 SCK
18
PRG SI
19 PRG SO
20 PRG SCK
AV JACK
21
22
NOT USED
23 CHG ON
24 VDD
25 AVSS
26~29 SCAN IN 3~0
30 NOT USED
31 DC_IN
32
CHG VOL
33 BATTERY
34
AVREF
35 AVDD
36 RESET
37
XCOUT
38 XCIN
IC
39
40 XOUT
41 XIN
42
VSS
43 BAT OFF
44 SREQ
45 JOG 0
46 SCAN_IN5
JOG 1
47
48 RSENS 1
I/O
Key matrix output
O
Digital power ON/OFF control
O
O Analog power ON/OFF control
LCD power ON/OFF control
O
O LCD backlight power ON/OFF
- GND
- VDD
Self-timer LED control
O
O
Stand-by LED (green) control
O Stand-by LED (red) control
O
A/D converter standard voltage control
I Receiving data (from ASIC)
O Sending data (to ASIC)
I/O Communication clock (to ASIC)
I Flash memory write receiving data
Flash memory write sending data
O
I/O Flash memory write communication clock
AV jack connection detection
I
-
-
Flash charge control
O
VDD
-
Analog GND
-
Key scan input
I
- -
DC JACK/battery detection input (analog input)
I
I Storobe charge voltage detection (analog input)
Battery voltage detection (analog input)
I
Analog standard voltage input terminal
-
- A/D converter analog power terminal
I Reset input
O Clock oscillation terminal (32.768 kHz)
I Clock oscillation terminal
Flash memory writing voltage
I
O
Main clock oscillation terminal (4MHz)
Main clock oscillation terminal
I
GND
-
Battery OFF detection
I
I
Serial communication requirement (from ASIC)
I Jog shuttle input 0
Key scan input 5
I
Jog shuttle input 1
I
I Inclination sensor input 1
– 8 –
Outline
H : ON
H : ON
H : ON
H : ON
L : ON
L : ON
L : ON
L : ON
H : AV JACK detection
H : ON
L : Inclination detection (left)
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