2-3
CHAPTER 2. TECHNICAL DESCRIPTION
2.2 Signal Processing
Fig. 3 Signal System Block Diagram
2.2.1 System Control
The CPU on the MAIN PCB ASS’Y controls the lens (motor, shutter), microphone input, operation switch
receiver, USB communication and flowing circuits.
• TG: Creation of the CCD drive pulse
• CDS, A/D: CCD signal processing and conversion of the digital data
• LCD Driver: Driving the LCD
• FLASH MEMORY: Firmware and adjustment data memory
• DSP: Picture processing
• RTC: Clock count for watch
• AF Support LED: AF auxiliary, self-timer and red-eye protection also serves as a lamp
• Electric Flash: Flash and charging circuit
CDS, A/D
LCD
Driver
CCD
Sensor
LENS
Motor Driver
AF Support LED
FINDER LED
Electric FLASH
CF card
LCD
TG
Video
Amp
RTC
FLASH MEMORY
DSP
CPU
SW
DIAL
KEY
HD, VD
CLK
Drive Pulse
MAIN PCB ASS'Y
SDRAM
MIC Amp
Audio
Amp
MIC
USB
AV OUT
BUZZER
SPEAKER
Содержание PowrShot G5
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