Major Functions Of Each Microcomputer - Canon ZR70 MC A Service Manual

5-2 Major Functions of Each Microcomputer

(1) FR MI-COM (IC2301 : VIC3)
The FR MI-COM, as the nucleus of the system, carries out control of mode transition plus mechanism control through communi-
cation with MODE MI-COM. It also detects of various sensors and switches (DMCIII). Following are the major functions.
• VIC (Video) VIF2 (Video Interface) control / AIF3 (Audio Interface) controls / DIF (Digital Interface) controls
• Control in accordance with IEEE1394
• USB interface control
• DMC III mechanism control
• Card control
• CCD drive control
• AE, AF, AWB control
• EIS (Electric Image Stabilizer) control
• OSD (On Screen Display) bitmap control
* The FR microcomputer in this machine does not have a dedicated EEPROM. Since a flash ROM is used for the
FR microcomputer as a substitute for the EEPROM, it is required to update the flash ROM after adjustment and
data modification regarding the FR microcomputer.
(2) MODE MI-COM (IC100)
The MODE MI-COM is mainly in charge of the power-on sequence and charging control. Following are the major functions.
• Key input
• LCD / EVF control
• Remote control input
• Power ON/OFF control
• Built-in charge circuit control
• MIC (Memory In Cassette) control
* In this machine, an EEPROM for the MODE microcomputer is mounted on the CAC P.C.B. instead of the MAIN
P.C.B.
CHAPTER 2. TECHNICAL DESCRIPTION
2-16
ZR70 MC A, ZR65 MC A, ZR60 A