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BAT_OFF
I
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1-5. 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.
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
29~34
35
36
37
38
39
40
41~44
45
47
50
46
48
SCLK
ZCARD
BACKUP CTL
BL ON
HOT LINE
TH ON
NOT USED
ZAV_JACK
VDD2
VF. LED (R)
VF. LED (G)
CAM_LED
CHG_LED
BAT CHG ON
LENS_4M
MRST
TRST
ZUSB_DET
BAT CHG CTL
P ON
ZBOOT_COMREQ
FLW_SR
AVREF ON
SCAN IN5~0
VSS3
VDD3
FLW_SI
FLW_SCK
FLW_SO
DC_IN
SCAN OUT3~0
BAT CHG ERR
TIME OUT
BAT CHG I
BAT_TEMP
ZSREQ
I/O
O
I
O
O
I
O
-
I
-
O
O
O
O
O
O
O
O
I
O
O
I
I
O
I
-
-
I
I
I
I
O
I
I
I
I
I/O
Outline
Serial data clock
SD card detection (L= card)
Backup battery charge control (L= charge)
LCD backlight control (H= ON)
Hot line from ASIC
Temperature sensor power ON/OFF (L= ON)
-
Backup 3.2 V
VF. LED (red) (H= lighting)
VF. LED (green) (H= lighting)
Cradle camera detection display LED drive (L= lighting)
Cradle charging display LED drive (L= lighting)
Start charging (H= start)
Lens driver 4M clock output
System reset output (L= reset)
T reset output (L= reset)
USB detection input (L= USB detection)
D/D converter ON/OFF control (H= ON)
Boot/command request input from ASIC
FLW_SR Flash writer
SW 3.2 V ON/OFF control (L= ON)
Keyscan input 5~0
GND
Backup 3.2 V
FLW_SI Flash writer
FLW_SCK Flash writer
FLW_SO Flash writer
DC power connection detection input (L= DC power detection)
Keyscan output 3~0
IC524 Fault output detection (L= fault detection)
IC524 CHRG output detection (L= TIME OUT detection)
IC524 Charge current monitoring (AD conversion input)
Lithum ion battery temperature detection (AD conversion input)
Battery OFF detection signal input (L= OFF detection)
Transmission clock for communication (SYA
↔
ASIC)
Charge current control
10
VSS2
-
GND
21
LCD ON1
O
LCD start-up signal output (H= start up)
22
PLLEN
O
PLL ON/OFF control (H=ON)
23
USB TRIG
I
Cradle USB trigger detection (H= trigger detection)
AV jack detection (L= AV jack detection)
25
CHG
O
Strobo condensor charge control signal (H= charge)