Sanyo VPC-HD1A Service Manual page 9

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.
Signal
Pin
1 SCLK
ZCARD
2
BACKUP CTL
3
4
CHG_CNT
5 HOT LINE
6 VF. LED (R)
LCD PWM
7
NOT USED
8
9 VDD2
10
VSS2
CHG ON
11
12 LCD ON1
13
CLKSEL0
14 P ON
15
BL ON
16 LENS 4M
17 NOT USED
18 MRST
19 VF. LED (G)
20 ZUSB_DET
21 CAM_LED
22 BAT_LED
23 PLLEN
24 USB_TRIG
25 TH_ON
26 BATCHGERR
27 LCD ON2
28
BATCHGCNT
29 AVREF ON
30~33 SCAN IN5~2
34 NOT USED
35, 36 SCAN IN1, 0
37 VSS3
38 VDD3
39
RD SEL
40 FLW_SCK
41 FLW_SO
42 DC_IN
43~46 SCAN OUT3~0
47 BOOT_COMREQ
48 BAT_CHGI
49
ZAV_JACK
I/O
O Serial data clock
SD card detection (L= card)
I
O Backup battery charge control
O Camera battery charge prohibition/permission
Hot line from ASIC
I
O VF. LED (red) (H= lighting)
-
O
-
-
- Backup 3.2 V
-
GND
O
Strobo condensor charge control signal (H= charge)
O LCD start-up signal output (H= start up)
O ASIC clock selection (fixing)
- D/D converter ON/OFF control (H= ON)
O
LCD backlight ON/OFF control (H= ON)
Lens driver IC standard CLK
O
-
-
System reset output
O
VF. LED (green) (H= lighting)
O
USB detection input
I
Cradle camera detection display LED drive
O
Cradle charge display LED drive
O
O PLL ON/OFF control (H= ON)
Cradle USB trigger detection
I
O Temperature sensor power ON/OFF
I Camera battery charge error detection (L= detection)
LCD power control (12 vL)
O
Camera charge control
O
O SW 3.2 V ON/OFF control (L= ON)
I Keyscan input 5~2
-
-
Keyscan input 1, 0
I
GND
-
-
Backup 3.2 V
I ON-tip debugger select terminal
I Serial data clock for flash
Serial data output for flash
O
I DC power connection detection input (L= detection)
Keyscan output 3~0
O
Command request input (combined with BOOT output)
I
IC521 charge electric current monitoring
I
AV jack detection (L= HD/ M=SD/ H=USB cable or no cable)
I
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