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47
/DC_IN
I
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1-4. SYA CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SYA block, refer to the block diagram. The SYA block 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
1~4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
21
22
23
30
32
33
34
35
36
37
38
39
40
41
42
43
45
44
46
/SCAN OUT 0~3
P ON
PA ON
BL_ON
LCD_ON
VSS
VDD
/SELF LED
/STBY_LED (GREEN)
/AVREF_ON
SI
SO
SCK
PRG SI
PRG SO
PRG SCK
NOT USED
NOT USED
CHG ON
NOT USED
CHG VOL
BATTERY
AVREF
AVDD
/RESET
XCOUT
XCIN
IC
XOUT
XIN
VSS
/BAT OFF
/SREQ
/SCAN IN3
SUB 1
I/O
O
O
O
O
O
-
-
O
O
O
I
O
I/O
I
O
I/O
-
-
O
-
I
I
-
-
I
O
I
I
O
I
-
I
I
I
I
Outline
Key scan output
Digital power ON/OFF control
H : ON
Analog power ON/OFF control
H : ON
LCD backlight ON/OFF control
H : ON
LCD power ON/OFF control
H : ON
GND
VDD
Stand-by LED (green) control
L : ON
A/D converter standard voltage control
L : ON
Receiving data (from ASIC)
Sending data (to ASIC)
Communication clock (to ASIC)
Flash memory writing receiving data
Flash memory writing sending data
Flash memory writing communication clock
-
-
-
Storobe charge voltage detection (analog input)
Battery voltage detection (analog input)
Analog standard voltage input terminal
A/D converter analog power terminal
Reset input
Clock oscillation terminal (37.768 kHz)
Clock oscillation terminal
Flash memory writing voltage
Main clock oscillation terminal (4MHz)
Main clock oscillation terminal
GND
Battery OFF detection
Serial communication requirement (from ASIC)
Key scan input 6
Command input (from ASIC)
DC jack/battery detection input
Flash charge control
H : ON
13
/STBY_LED (RED)
O
Stand-by LED (red) control
L : ON
24
VDD
-
VDD
25
AVSS
-
AVSS
27~29
SCAN IN 0~2
I
Key scan input
Self LED (red) control
L : ON
31
NOT USED
-
-
26
NOT USED
-
-
Summary of Contents for Xacti VPC-S1
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