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H-10
Ver. 1
H. DESCRIPTION OF MECHANISM
C-7070 Wide Zoom
Table 5-2. Key Operation
3. Key Operaiton
For details of the key operation, refer to the instruction manual.
0
1
2
3
0
1
2
3
SCAN
OUT
SCAN
IN
PLAY
1st
SELF/REMOTE
CONTROL
A
MOVIE
2nd
SCENE
TELE
M
My
WIDE
CUSTOM
S
4
-
LCD OPEN
5
-
AEL
7
-
-
6
EXPOSURE
CONTROL
LCD REV H
P
SPOT
MF/SW
FLASH
LCD REV V
4
CF/xD
UP
DOWN
LEFT
OK/MENU
RIGHT
LCD
QUICK VIEW
5
TEST
PW ON
4. Power Supply Control
The 8-bit microprocessor controls the power supply for the overall system.
The following is a description of how the power supply is turned on and off. When the battery is attached, power voltage is
supplied to IC302, a regulated 3.2 V voltage is normally input to the 8-bit microprocessor (IC301) by IC302, clock counting
and key scanning is carried out even when the power switch is turned off, so that the camera can start up again.
When the power switch is off, the 8-bit microprocessor halts 4 MHz of the main clock, and operates 32.768 kHz of
subclock.
When the battery is removed, the 8-bit microprocessor power switches the battery for memory backup by IC302, and
operates at low consumption. At this condition, the 8-bit microprocessor halts the main clock, and operates clock counting
by sub clock.
Also, the secondary battery for backup is charged 10 hours from it to be attached.
When the power switch is on, the 8-bit microprocessor starts processing. The 8-bit microprocessor first sets both the
PON signal at pin (85) and the PAON signal at pin (86) to High, and then turn on the power circuit. After PON signal is to
High, sets external port of ASIC after approximately 100 ms. According to setting of this external port, carry out setting of the
operating frequency and oscillation control in the ASIC. Also, it starts communication with ASIC, and confirms the system
is operative.
When the through image is operating, set the PAON signal to High and then turn on the CCD. When playing, set the PAON
signal to Low and then turn off the CCD. When LCD panel turns on, set LCD ON signal at pin (23) to High, and then turn
on the power. Set BLON signal at pin (25) to High, and turn on the backlight power.
When the power switch is off, the lens will be stowed, and PON, PAON, LCDON and BLON signals to Low and the power
supply to the whole system is halted. The 8-bit microprocessor halts oscillation of the main clock, and set operation mode
of clock ocillation.
EXTRA
-
-
-
-
-
-
-
-
-
-
-
ASIC,
memory
CCD
8bit
CPU
LCD
MONITOR
Power supply voltage
Power OFF
Playback mode
Shooting mode (OVF)
Shooting
USB connection
1.25 V, 3.25 V
15 V, -7.6 V
3.45 V
3.2 V
8.5 V, 3.25 V
OFF
OFF
32KHz
OFF
ON
OFF
4MHz
ON
ON
OFF
4MHz
ON
OFF
OFF
4MHz
OFF
ON
ON
4MHz
ON
ON
OFF
4MHz
OFF
Table 5-3. Power supply control
Shooting mode (LCD)