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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.
See next page
Pin
Signal
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
24
26
27
28
29
30
31
32
33
34
35
36
37
39
41
38
40
BATTERY
VMONIT
SCAN IN5
COMREQ
SCAN IN1
SCAN IN2
SCAN IN3
SCAN IN4
AVSS
SCAN OUT2
BAT_OFF
SREQ
CHG ON
SCAN IN0
SCK/PRG SCK
VDD
SO/PRG SO
SI/PRG SI
SCAN OUT1
XCIN
XOUT
XIN
VSS
VDD
PA ON2
LCD ON2
P ON
PA ON
LCD ON
BL ON
LCD ON3
VSS
PLLEN
MAIN RESET
AVREF ON
ASIC TEST
I/O
I
I
I
I
I
I
I
I
-
O
I
I
O
I
O
I
O
I
O
I
O
I
-
I
O
O
O
O
O
O
O
-
O
O
O
O
Outline
Battery voltage detection
Main capacitor charge voltage detection
Key matrix input
Command request
Key matrix input
Key matrix input
Key matrix input
Key matrix input
GND
Key matrix output
Battery off detection signal input
Serial communication requirement signal
Strobe charge control
Key matrix input
Serial clock output/serial clock output for flash
VDD
Serial data output/serial data output for flash
Serial data input/serial data input for flash
Clock oscillation terminal (32.768 kHz)
Main clock oscillation terminal
Main clock oscillation terminal (4 MHz)
GND
VDD
D/D converter (analog system) ON/OFF signal 2
D/D converter (LCD system) ON/OFF signal 2
D/D converter (digital system) ON/OFF signal
D/D converter (analog system) ON/OFF signal
D/D converter (LCD system) ON/OFF signal
Backlight ON/OFF
D/D converter (LCD system) ON/OFF signal 3
GND
PLL oscilllation ON/OFF
System reset (MRST)
AD VREF ON/OFF signal
ASIC control signal (ZTEST)
Key matrix output
10
LED. VF
O
VF LED (H = Lighting)
21
SCAN OUT0
O
Key matrix output
22
IC
-
Power for program writing
23
XCOUT
O
Clock oscillation terminal
25
RESET
I
Reset input
