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CHAPTER 2 FUNCTIONS & OPERATION
Function list of major ICs
IC No. Name Function
IC1 SDRAM (128 Mbit) Working memory for the scanner controller and for
storing image data temporarily
IC2 SDRAM (128 Mbit) Working memory for the scanner controller and for
storing image data temporarily
IC6 Scanner controller Overall scanner control
IC8 Serial EEPROM (2 kbit) Saves the various setting data
IC11 Flash memory (16 Mbit) Stores firmware
IC14 Sensor control
microcontroller
Controls the ultrasonic sensor and other sensors for
detecting documents
IC16 Motor driver For driving the feed motor
IC17 Motor driver For driving the main motor
Table 2-401
2-14
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CANON ELECTRONICS INC. 2011 CANON DR-M140 FIRST EDITION