– 9 –
Fig. 4-1 Internal Bus Communication System
Table 4-2. Key Operation
2. Internal Communication Bus
The SY1 circuit board 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. 4-1 shows the internal commu-
nication between the 8-bit microprocessor, ASIC and SPARC lite circuits.
3. Key Opera
ti
on
For details of the key operation, refer to the instruction manual.
Table 4-1. 8-bit Microprocessor Port Specification
0
1
2
0
1
2
3
SCAN
OUT
SCAN
IN
←
LEFT
MODE
PLAY MODE
INFO
↓
DOWN
REC MODE
(LCD OFF)
→
RIGHT
3
STILL IMAGE
VIDEO CLIP
SHOOTING
4
1st shutter
SET UP
↑
UP
4
WIDE
TELE
5
2nd shutter
-
BARRIER
CLOSE
TEST
POWER ON
63
64
ASIC RESET
MAIN RESET
O
O
ASIC reset control signal 2
L : Reset
Main CPU reset singal
L : Reset
61
62
51
I
Buzzer beep tone output
L : Pulse output
52
BUZZER
O
USB connector detection
L : USB detecion
57
ASIC TEST
O
ASIC reset control signal 1
L : Reset
USB
NOT USED
-
-
59
60
CARD
I
CF card insertion detection
L : Insertion
NOT USED
-
-
BR CLOSE
O
Barrier close control
L : Close
49
BR OPEN
O
Barrier open control
H : Open
50
RSENS 0
I
Inclination sensor input 0
L : Inclination detection (right)
53
SCAN IN 4
I
Key scan input 4
54
SCAN OUT 4
O
Key scan output 4
55
WAKE UP
I
-
56
SYMUTE
O
Audio mute control
L : Mute
58
NOT USED
-
-
8-bit
Microprocessor
CPU
S. REQ
ASIC TEST
ASIC SO
ASIC SI
ASIC SCK
MAIN RESET
REC MODE
(LCD ON)
SET
FLASH MODE BARRIER OPEN
SEQUENTIAL
SHOT
PC MODE
-
-
-
-
-
ASIC RESET
