Canon EOS D60, Руководство по обслуживанию

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Part 2: Technical Information
2-16
1. D Board
This board process the signals of main section, and it includes the digital
section's microcomputer which controls the entire sequence and performs the
image processing.
Major Components Function
IC3(CPU) Reads all operation and status switches, and controls
USB communication, video output, camera section's
imaging and power source.
IC4(RTC) Real-time clock
IC11 Flash memory (stores firmware)
IC12(DSP) Graphic engine. After fixing the malfunction of the images
such as C-MOS scratch data update and shading,
processes and readouts to CF card.
IC14 17 Memory with a storage capacity of 128 Mbytes with the
SDRAM and 256 Mbits
×
4. Serves as a temporary storage
for the data after image processing
2. A (analog) Board
Generates the CMOS-driving pulse and converts the C-MOS output from analog to digital.
Major Components Function
IC5004(A/D converter) Converts the analog signal to the 12 bit C-MOS signal.
IC5006(D/A converter) Sets the C-MOS peripheral bias voltage.
IC5008(EEPROM)
Records the C-MOS initial information
IC5010(TG) Sends driving pulse for C-MOS and does dark current
processing.
IC3
IC11
IC12
IC14
IC15
IC16
IC17
IC4
Fig. 2-21 D1 Board Fig. 2-22 D2 Board