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CHAPTER 2
APPLICATION OF PROGRAMMING
This chapter describes applications of programming.
2.1
Memories and Files
2.1.1
Memories
The following memories are available.
• Program memory
• Standard RAM
• Standard ROM
• SD memory card
(1) Program memory
This memory stores programs and parameters required in processing of the CPU module.
(a) Processing a program
When a program is executed, data in the program memory are transferred to the program cache memory
*1
at
the following timings.
• Initial processing at power-on
• Initial processing at reset
*1
The program cache memory is used for program operations.
(b) Writing to the program memory
When a program is written to the program memory, it is temporarily written to the program cache memory, and
then automatically transferred back to the program memory.
While the CPU module is in the RUN status, automatic data transfer to the program memory can be disabled by setting.
(
<Drive 3>
Standard RAM
(SRAM)
<Drive 4>
Standard ROM
(flash ROM)
<Drive 0>
Program
memory
(flash ROM)
Inside CPU module
Programming tool
1) Data are written to the program
cache memory first.
2) After writing to the program
cache memory, the data are
automatically transferred to
the program memory.
Program
cache
memory
(SRAM)
Содержание L02CPU
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