Sanyo VPC-WH1W Service Manual page 9

48 BAT_TMP
49 BAT_OFF
ZSREQ
50
51
KEY_1st
52
ZBOOT_COMREQ
53 ZRESET
54 XCIN
55
XCOUT
56
VSS1
57 XIN
58
XOUT
59 VDD1
60
BATTERY
61
NOT USED
62
INT_TEMP
63
ASIC_SDI
64
ASIC_SDO
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
IN
0
SCAN
OUT
0 UP
1 -
2 PW_TEST
I Battery temperature detection
Battery OFF detection signal input
I
I Serial communication request signal (CL required)
I S1 key input
I/O
ZBOOT output
I SBM reset input
I 32 k oscillation input
O
32 k oscillation output
-
-
I 4M oscillation input
O 4M oscillation output
-
-
I UNREG voltage detection
- -
I Camera temperature detection
O Serial data output (CL required)
Serial data input (CL required)
I
Table 5-1. 8-bit Microprocessor Port Specification
PLLEN
SREQ
ASIC_SDO
ASIC_SDI
ASIC_SCK
MRST
Fig. 5-1 Internal Bus Communication System
1 2
DOWN LEFT
VREC PLAY
-
TEST
Table 5-2. Key Operation
– 9 –
ASIC
3
4
RIGHT SET
MENU POWER
- -