Konica Minolta bizhub 200 Service Manual page 138

Theory of Operation Ver. 1.0 Aug. 2005
C. Function
(1) RM5231A
• This is the CPU of the system. It is an external 32 (internal 64) bit RISC processor.
(2) DEM LSI
• It connects the CPU and the controller for controlling overall operation of the system.
(3) Program memory (RAMS board section)
• The program board with software for operating the system is mounted here. The program
is downloaded to the work memory (SDRAM) on MFBS when the power is turned ON.
The program starts on the work memory.
(4) Work memory (SDRAM)
• This memory serves the work area of the system operation.
(5) Backup memory (SRAM)
• It is a 512 KB capacity memory that stores the status information of the system.
D. Backup function
(1) Method
Backup location
Battery backup memory
Clock LSI
(2) Backup contents
Back up location
Battery Backup RAM
Clock LSI
Method
Lithium battery
5 years approx.
(discharge type)
Phone number: Abbreviated phone numbers
Self-data: TSI information and serial number are backed up
Soft switch: Registration data of soft switches
Communication management: Information on activity reports
Time count
3. Summary of Board functions
Lifetime Voltage/current
3 V/600 mA
Contents
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