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2-5. LCD
After the images stored on the SDRAM (U21) are
processed inside DSP (U20) again, they are modified
to the appropriate size, bit width (6 bit per each RGB)
and sent to the LCD driver (U3) with the driving signal
required.
2-6
Monitor Out
In the same way as described in the LCD section, after
the images are modified to the appropriate size, the
Video player (VP) inside U20 develops a signal modu-
lated to NTSC and PAL format by DA (Pin ) output (pin
177) of U20. The image signal passes through the 75
ohm driver (U201) inside the power unit (U300) and
develops from the connector (J204).
2-7. Lens Control
The lens module controls the stop motor control signal
(J401A) input for Zoom, Focus and Iris & shutter, the
photo coupler output (J402, pin 15) for the iris mode
detection and the potentiometer output (J402, pin 3)
for the zoom position detection. Each motor control
signal is converted to 2-phase excitation signal in the
motor driver by using the PWM output (U100, J14A) of
DSP and sent to the motor.
2-8. AF&AE
The captured images are processed by shifting the iris
and focus position inside DSP (U20) to obtain the best
iris & focus position. Only when using a half-shutter
function, AE & AF operation is carried out.
2-9. Zoom
Zoom key -> detection of potentiometer alignment by
a sub-microprocessor -> Raptor PWM output -> Con-
trol by a motor
The fine adjustment of focus is carried out by every
position at Zoom.
2-10. Card Access
The data stored on a SD-RAM is compressed inside
DSP and recorded in a SM card. The Gate (U26, 27)
is inserted to protect for a damage by insertion/extrac-
tion of a card. The gate is forcedly opened/closed by
a card detection signal (J15 Pin17) of socket. The
presence or absence of the card is detected according
to the detection of the press signal.
2-11. Strobe Control
Strobe charge is controlled by a sub microprocessor
and the light emission is controlled by DSP (U20)
corresponding to the CCD output amount. The sub
microprocessor detects a charge voltage by turning
STROBE_V (J201A Pin27) and controls to keep 300V
by turning CHARGEb (J201A Pin23) ON/OFF.
Light emission amount is controlled by ON time of
FLASH signal (J201A Pin1).
Furthermore, in the sub microprocessor the
FLASH_Enb signal (J201 Pin9) prohibits the strobe
from working unnecessarily.
2-12. Power Supply
The power supply is controlled by the sub microproc-
essor.
1. Power supply controlled by POWER_Enb
Power supply for Motor: 2.6V
Power supply for Logic: 2.6V, 3.3V
Power supply for analog: 5V, 6V, 15V, -9V
2. Power supply controlled by BKLT_PWMb
Power supply for LCD backlight:
3. Power controlled by -32V_EN
Power supply for LCD:
4. Ever ON
Power supply for backup:
2-13. Alignment data
The alignment data for CCD and strobe is written at the
top block of FlashRAM (U21).
– 6 –
-32V(VEE)
3.3V_UC
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