Sanyo VPC-PD1EXBK, Service Manual

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8. Key Operaiton
For details of the key operation, refer to the instruction manual.
Table 2-2. Key Operation
0
0
1 2 3
SCAN
OUT
SCAN
IN
DOWN (T)
VREC POWER
1
2
LEFT
- - -
DELETE
-
RIGHT
PLAY
-
4
SET
-
UP (W)
ASIC/memory/LCD
CMOS
Power OFF
Play mode
VDD1.1, VDD1.8, VDD3
OFF OFF
ON
ON
Shooting mode
CMOS1.8, VAA2.8
ON OFF
Table 2-3. Power Control
9. Power Supply Control
When the battery is attached, a AL3.2 V power is normally input to the power sequencer block, so that key scanning is carried out
even when the power switch is turned off, so that the camera can start up request again from user.
If the start up request is occured, the PON signal set to high, and then turns on the DC/DC converter.
In addition, the resetting of the CPU inside the ASIC is canceled. This causes all blocks and memories other than the power
sequencer of the ASIC to start operating.
When the power switch is turned off, the ASIC returns to the reset condition, all DC/DC converters are turned off and the power
supply to the whole system is halted.
3
- - - -
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