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1-5. SY1 CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY1 circuit, refer to the block diagram. The SY1 circuit 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
SCK
1
2
CARD
BACKUP_CTL
3
4
BAT_CHG ON
5
HOT_L2
6
NOT USED
LCD_PWM
7
8
NOT USED
9
VDD2
10
VSS2
11
VF. LED (R)
12
VF. LED (G)
13
TH ON
14
BAT_CHG_CNT
15
BL ON
16
LENS_4M
17
MAIN RESET
LCD ON2
18
19
USB_DET
20
DC_IN
21
LCD ON1
22
PLLEN
23
TRST
24
AV JACK
25
ST_CHG ON
26
BOOT_COMREQ
27
PRG ENA/DATA1
28
AVREF ON
29
SCAN IN5
30
SCAN IN4
31
SCAN IN3
32
SCAN IN2
SCAN IN1
33
34
SCAN IN0
35
VSS3
36
VDD3
37
RDSEL
38
CLK (SFW)
39
DATA0 (SFW)
40
P ON
SCAN OUT3~0
41~44
45
CHGERR
I/O
Serial clock output
O
Card detection
I
O
Backup battery charge control
Camera battery charge prohibition/permission
O
I
Hot line request from ASIC
-
-
O
LCD backlight brightness adjustment
-
-
-
VDD
-
GND
O
Red LED (H= lighting)
O
Green LED (H= lighting)
O
Battery temperature & card detection power control
O
Camera charge electric current control
O
LCD backlight ON/OFF signal
Lens driver IC standard clock output
O
O
System reset (MRST)
D/D converter (LCD system) ON/OFF signal
O
USB power detection terminal (L= detection)
I
DC jack detection
I
D/D converter (LCD system) ON/OFF signal
O
PLL oscillation ON/OFF
O
Use LEDA3 when starting
O
AV JACK detection
I
Strobo charge control
O
I
Command request input (combine with BOOT output)
Flash rewrite select terminal
I
AD VREF ON/OFF signal
O
I
Key matrix input
I
Key matrix input
I
Key matrix input
I
Key matrix input
Key matrix input
I
I
Key matrix input
GND
-
VDD
-
Select terminal for on-tip debugger
I
O
Flash rewrite (combine with ROM debugger)
O
Flash rewrite (combine with ROM debugger)
D/D converter (digital system) ON/OFF signal
O
Key matrix output
O
I
Camera charge error detection
– 8 –
Outline
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