Sanyo VPC-HD1A - Page 10

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Fig. 5-1 Internal Bus Communication System
Table 5-2. Key Operation
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.
3. Key Operaiton
For details of the key operation, refer to the instruction manual.
Table 5-1. 8-bit Microprocessor Port Specification
63
64
53
-
Keyscan input 6
54
SCAN IN6
I
GND
59
CHG_DONE I Strobo condensor charging completion signal input (H= completion)
VSS1
BATTERY
I UNREG_SY voltage mesurement input
61
62
ZSREQ
I/O
Transmission clock for communication (SYA ↔ ASIC)
XOUT O Main clock
VDD1
-
Backup 3.2 V
51
NOT USED
-
-
52
BAT_OFF
I Battery OFF detection signal input (L= OFF detection)
55
IR_IN
I
Infrared remote control transmission data input
56
RESET
I
Reset input
57
XCIN
I
Clock (32.768 kHz)
58
XCOUT
O
Clock
60
XIN I
Main clock (4MHz)
1
2
0
1
2
3
SCAN
OUT
SCAN
IN
← LEFT
REC
↓ DOWN
SHUTTER 1st
↑ UP
3
4
SET
SHUTTER 2nd
→ RIGHT
WIDE
TELE
5
CAMERA
MENU
6
PLAY
SPEED UP
POWER ON
PANEL OPEN
0
8-bit
Microprocessor
ASIC
S. REQ
ASIC SO
ASIC SI
ASIC SCK
ASIC RESET
MRST
LCD
ROTATION
POP UPHD/SD
TEST
SEQUENTIAL
SHOT
STROBO
-
-
-
-
-
-
50
BAT_TEMP
I
Lithium battery temperature detection
Serial data input to ASIC
Substrate temperature measurement input around ASIC
65
INT_TEMP I
66
ASIC_SDO I
67
ASIC_SDI
O
68
NOT USED -
Serial data output to ASIC
-