– 8 –
Fig. 5-1 Internal Bus Communication System
Table 5-2. Key Operation
2. Internal Communication Bus
The SY1 circuit 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
48
I
ASIC PLL oscillation ON/OFF
49
PLLEN
O
AV JACK connection detection (H=AV JACK detection)
59
BATTERY
I
Battery voltage detection (analog)
AV JACK
CHG_VOL
I
Strobo condensor charge level (analog)
61
62
AVREF ON
O
AD VREF ON/OFF signal (L=ON)
BAT_TEMP
I
Battery temperature (analog)
INT_TEMP
I
Internal temperature (analog)
46
LCD ON2
O
LCD ON2
47
CARD
I
Card detection (L=card)
50
ASIC TEST
O
ASIC control signal (ZTEST)
51~56
SCAN IN 5~0
I
Key scan input 5~0
57
NC
I
GND
58
DC_IN
I
DC adaptor connection detection (L=DC adaptor)
60
NC
I
GND
1
2
0
1
2
3
SCAN
OUT
SCAN
IN
←
LEFT
REC
↓
DOWN
1st SHUTTER
↑
UP
3
4
SET
2nd SHUTTER
→
RIGHT
WIDE
TELE
5
MENU
CAMERA
6
LCD LOTATION
PLAY
POWER ON
PANEL OPEN
0
8-bit
Microprocessor
ASIC
S. REQ
ASIC SO
ASIC SI
ASIC SCK
ASIC RESET
MRST
ZTEST
PLAY
REC (CAM)
REC (MOV)
TEST
