Sanyo VPC-CA9BK Service Manual page 8

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
ASIC_SCK
1
2 PON2
CL
3
POW_TEST
4
HOT LINE
5
6 TEST
CL
7
LCDPWM
8
9 VDD2
VSS2
10
11 ST_CHG
ZCHGDONE
12
ONENAND RESET
13
ZBACKUPCTL
14
KEY_PLAY
15
GREEN_LED
16
MRST
17
RED_LED
18
UTX
19
RTX
20
MR_OPEN
21
KEY_MENU
22
KEY_VREC
23
KEY_1st
24
KEY_POWER
25
ZBOOT_COMREQ
26
NOT USED
27
NOT USED
28
KEY_SET
29
KEY_UP
30
KEY_DOWN
31
KEY_LEFT
32
KEY_RIGHT
33
NOT USED
34
VSS3
35
VDD3
36
RDSEL
37
CLK (SFW)
38
DATA0 (SFW)
39
P ON
40
NOT USED
41
SW3.2ON
42
I/O
TO Asic
O
O
PWA DIGITAL
CL
O
Test mode
I
Correspondence from ASIC
I
Test mode
I
CL
O
LCD backlight brightness control
O
- -
-
-
O Strobe charge control (H= charge)
Main condensor charge voltage detection
I
OneNAND flash reset
O
Backup circuit (L=ON)
O
L: Key detection PLAY
I
Green LED
O
System reset (L=reset)
O
SW unit LED (H= lighting)
O
Battery residual quantity ICTXD: Debugger
O
Battery residual quantity ICRXD
I
L: Panel close
I
Key detection MENU (L= detection)
I
Key detection VREC (L= detection)
I
L: InterruptKey. Key detection shutter
I
L: InterruptKey. Key detection POWER
I
BOOT low output
I/O
-
-
-
-
Key detection SET (L= detection)
I
Key detection UP (L= detection)
I
Key detection DOWN (L= detection)
I
Key detection LEFT (L= detection)
I
Key detection RIGHT (L= detection)
I
-
-
-
-
-
-
Debugger terminal
-
Debugger terminal
-
Debugger terminal
-
PWA DIGITAL
O
-
-
SW 3.2V supply (L= ON)
O
- -
8
Outline
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