Fp2 Operation; Fp2 Ram And Rom Operations; Comparison Of Ram And Rom Operations - Panasonic fp2/fp2sh User Manual

FP2/FP2SH
6.1

FP2 Operation

6.1.1

FP2 RAM and ROM Operations

6.1.1.1

Comparison of RAM and ROM Operations

With the FP2, either RAM operation or ROM operation can be selected for the execution
method of the program.
RAM operation: Executes the program written into the internal RAM of the CPU.
ROM operation: Transfers the program stored in the ROM of the expansion memory
unit to RAM and executes the program.
Comparison of RAM operation and ROM operation
Item RAM operation
Items necessary for Nothing in particular since operation is per-
operation formed by the RAM built into the CPU.
Normal maximum number of steps is 16k.
With the optional expansion memory unit
(FP2−EM2, FP2−EM3 or FP2−EM6) installed,
the maximum number of steps is 32k.
Processes inside Program written in RAM is executed when
the CPU RUN mode is entered.
Memory contents Program
backed up by System registers
battery Hold type data of operation memory
Maintenance Replacement of backup battery is vital
FP2/FP2SH Operation
6.1
ROM operation
Optional expansion memory unit (FP2−EM3,
FP2−EM6 or FP2−EM7)
ROM with the program written on it
When the power is turned on, the program in
ROM is transferred to RAM, and then execut-
ed.
Hold type data of operation memory (The pro-
gram and the system register within ROM are
saved without battery.)
If program does not use hold type data of op-
eration memory, then operation without a
backup battery is possible.
FP2 Operation
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