Table of Contents
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2. Function
• CPU
It uses an external 32 bit RISC processor.
• IPUS LSI
It connects the CPU and the controller for controlling overall operation of the system.
• Program memory (ROM)
The software program for operating the system is stored here.
It has a memory capacity of 16 MB.
• Work memory (DRAM)
This memory serves the work area of the system operation.
Standard memory capacity is 4 MB on the MFB2 board.
• Backup memory (SRAM)
It is a 512KB memory that stores the status information of the system.
3. Backup function
• Method
Backup location
Battery backup RAM
Clock LSI
*: Daily usage 12 hours - It will last at least 10 years even if the system is always ON.
4. Backup contents
Back up location
• Phone number........ Abbreviated phone numbers
• Self-data................TSI information and serial number are backed up
Battery Backup
• Soft switch..............Registration data of soft switches
RAM
• Communication management....Information on activity reports
Clock LSI
Time count
Method
Lithium battery
(discharge type)
M-7
Lifetime
5 years approx
*
Contents
Voltage/current
3 V / 1000 mAh
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