Sanyo VPC-J4 Service Manual page 7

45
BOOT_COMREQ
46
NC
47
CARD
48 AVREF ON
49 PLLEN
50
ASIC TEST
51~56
SCAN IN5~0
57 NC
58
DC_IN
59 AV_JACK
60
CHG_DONE
61 NC
62 INT_TEMP
63
NC
64
BATTERY
2. Internal Communication Bus
The SYA block carries out overall control of camera operation by detecting the input from the keyboard and the condition of the
camera circuits. The 8-bit microprocessor reads the signals from each sensor element as input data and outputs this data to the
camera circuits (ASIC) or to the LCD display device as operation mode setting data. Fig. 5-1 shows the internal communication
between the 8-bit microprocessor, ASIC and SPARC lite circuits.
8-bit
Microprocessor
3. Key Operaiton
For details of the key operation, refer to the instruction manual.
SCAN
SCAN
IN
OUT
← LEFT
0
1 MODE
2 REC (MOV)
O
Boot/command request
(Output mode "0" fixing)
O
I Card detection (L= card)
O AD VREF ON/OFF signal (L= ON)
O
ASIC PLL oscillation ON/OFF
O ASIC control signal (ZTEST)
O
Key scan input 5~0
I
I
DC adaptor connection detecion (L= DC adaptor)
I AV JACK connection detection (H= AV JACK detection)
Storobe charge detection (input port) (L= ON)
I
I
I Internal temperature detection (analog)
I
Battery voltage detection (analog)
I
Table 5-1. 8-bit Microprocessor Port Specification
Fig. 5-1 Internal Bus Communication System
1
0
↑ UP
MENU
REC (CAM)
Table 5-2. Key Operation
ZTEST
ASIC RESET
S. REQ
ASIC SO
ASIC SI
ASIC SCK
PLLEN
CLKSEL0
2
3
↓ DOWN
→ RIGHT
TELE WIDE
PLAY
– 7 –
ASIC
4 5
TEST
SET
1st SHUTTER 2nd SHUTTER