– 7 –
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
ZTEST
/ASIC RESET
O
O
ASIC reset signal
L : RESET
CPU reset singal
L : RESET
61
62
51
I
-
52
NOT USED
-
USB connector detection
L : USB detecion
57
PLLEN
O
PLL reset signal
L : RESET
/USB
CLKSEL 1
O
CPU clock swtich control
59
60
/CARD
I
SD card insertion detection
L : Insertion
BR CLOSE
O
Lens barrier close control
H : Close
CLKSEL 0
O
CPU clock ON/OFF control
H : ON
49
AV JACK
I
AV jack connection detection
H : AV jack detection
50
OPEN
I
Lens barrier open detection switch input
53
LCD ON2
O
LCD power ON/OFF control 2
54
/SCAN_IN 4
I
Key scan input 4
55
/SCAN_IN 5
I
Key scan input 5
56
/BACKUP_CNT
O
Backup battery charge control
L : Charge ON
58
BR_OPEN
O
Lens barrier open control
H : Open
1
2
0
1
2
3
SCAN
OUT
SCAN
IN
←
LEFT
REC
FLASH
PC CAM
→
RIGHT
SET
PLAY
↓
DOWN
REC (VF)
4
WIDE
1st SHUTTER
↑
UP
MENU
MODE
OPTION
5
TELE
2nd SHUTTER
COM
6
TEST
POWER OFF
0
8-bit
Microprocessor
ASIC
S. REQ
ASIC SO
ASIC SI
ASIC SCK
ASIC RESET
PLLEN
CLKSEL0
CLKSEL1
ZTEST
48
BOOT
I/O
Compulsion boot control
L : DC JACK detection
