Table of Contents
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49
AV JACK
50
DC IN
51
CARD
52
BUZZER
53
SCAN OUT 4
54
SCAN IN 4
55
SCAN IN 5
56
SUB1
57
USB
58
LCD ON2
59
NTZPAL
60
BACKUP_CNT
61
ASIC TEST 0
62
ASIC TEST 1
63
ASIC TEST 2
64
ASIC RESET
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. 5-1 shows the internal communi-
cation 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
SCAN
0
IN
OUT
← LEFT
0
1
PLAY
2
-
3
WEB
4
-
I
AV jack connection detection
O
DC jack/battery detection input (analog input)
CF card insertion detection
I
O
Buzzer beep tone output
I
Key scan output 4
O
Key scan input 4
I
Key scan input 5
I/O
Communication line to main
I
USB connector detection
O
LCD ON/OFF control 2
O
NTSC/PAL switch
O
Backup battery charge control
O
ASIC reset control signal 0
O
ASIC reset control signal 1
ASIC reset control signal 2
O
O
ASIC reset singal
Table 5-1. 8-bit Microprocessor Port Specification
ASIC RESET
S. REQ
ASIC SO
ASIC SI
ASIC SCK
ASIC TEST 1
ASIC TEST 2
ASIC TEST 0
Fig. 5-1 Internal Bus Communication System
2
1
↑ UP
↓ DOWN
VF
LCD
-
TEST
DC MODE
SET UP
-
-
Table 5-2. Key Operation
– 8 –
4
3
→ RIGHT
MENU
WIDE
TELE
FOCUS
FLASH
VIDEO CLIP
SEQUENTIAL
SHOOTING
SHOT
-
-
H : AV jack detection
L : DC jack insertion
L : Insertion
H : Pulse output
L : USB detecion
H : ON
H : NTSC
L : Charge ON
ASIC
6
5
SET
-
-
-
1st
2nd
-
STILL IMAGE
POWER ON
-
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