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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
BATTERY
2
VMONIT
SCAN IN5
3
4
COMREQ
SCAN IN1
5
6
SCAN IN2
SCAN IN3
7
SCAN IN4
8
AVSS
9
10
LED. VF
11
SCAN OUT2
12
BAT_OFF
13
SREQ
14
CHG ON
15
SCAN IN0
16
SCK/PRG SCK
17
VDD
18
SO/PRG SO
19
SI/PRG SI
20
SCAN OUT1
21
SCAN OUT0
22
IC
23
XCOUT
24
XCIN
25
RESET
26
XOUT
27
XIN
28
VSS
29
VDD
30
PA ON2
31
LCD ON2
32
P ON
PA ON
33
34
LCD ON
35
BL ON
36
LCD ON3
37
VSS
38
PLLEN
39
MAIN RESET
40
AVREF ON
41
ASIC TEST
I/O
I
Battery voltage detection
Main capacitor charge voltage detection
I
I
Key matrix input
Command request
I
Key matrix input
I
I
Key matrix input
Key matrix input
I
Key matrix input
I
-
GND
O
VF LED (H = Lighting)
O
Key matrix output
I
Battery off detection signal input
Serial communication requirement signal
I
O
Strobe charge control
I
Key matrix input
Serial clock output/serial clock output for flash
O
VDD
I
Serial data output/serial data output for flash
O
I
Serial data input/serial data input for flash
Key matrix output
O
Key matrix output
O
Power for program writing
-
Clock oscillation terminal
O
I
Clock oscillation terminal (32.768 kHz)
I
Reset input
O
Main clock oscillation terminal
Main clock oscillation terminal (4 MHz)
I
-
GND
I
VDD
O
D/D converter (analog system) ON/OFF signal 2
D/D converter (LCD system) ON/OFF signal 2
O
O
D/D converter (digital system) ON/OFF signal
O
D/D converter (analog system) ON/OFF signal
D/D converter (LCD system) ON/OFF signal
O
O
Backlight ON/OFF
D/D converter (LCD system) ON/OFF signal 3
O
GND
-
O
PLL oscilllation ON/OFF
System reset (MRST)
O
AD VREF ON/OFF signal
O
O
ASIC control signal (ZTEST)
– 7 –
Outline
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