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42
BACKUP CTL
43
AVDD
44
AVREF
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. 4-1 shows the internal communication
between the 8-bit microprocessor and ASIC.
8-bit micro processor
setting of
external port
communi-
cation
3. Key Operaiton
For details of the key operation, refer to the instruction manual.
SCAN
SCAN
0
IN
OUT
0
SET
1
UP
2
PW_ON
O
Backup battery charge control
VDD
I
I
Analog standard voltage input terminal
Table 4-1. 8-bit Microprocessor Port Specification
MRST
ZTEST
PLLEN
SI
SO
SCK
SREQ
COMREQ
Fig. 4-1 Internal Bus Communication System
1
2
DC_IN
RIGHT
DOWN
S2
S1
Table 4-2. Key Operation
– 8 –
ASIC
4
3
PLAY
VF
LEFT
CARD
USB_CONNECT
TELE
WIDE
5
REC
MENU
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