Renesas SDI Emulator System M32100T-EZ-E Manual de usuario descargar pdf (Pagina 5)

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(4) Other cautions and restrictions dependent on MCU model

IMPORTANT

Note on Using the MVTC Instruction (1):

• When the user program is stopped by the MVTC instruction at the address of the

instruction which operates BPC, a BPC value may be changed even if the MVTC

instruction has not been executed. Occurrence of this phenomenon depends on the

MCU status and the instruction sequence. After this phenomenon occurs, the program

is normally re-executed starting with the PC value of the MVTC instruction.

The following shows sample data when the phenomenon occurs.

Example:

Address Instruction

H'100 LD24 R0,#H'100

H'104 MVTC R0,BPC

H'106 NOP

When a break occurs at PC = H'104 in the above program fragment, BPC = H'100

may be enabled even before the MVTC instruction is executed.

Note on Using the MVTC Instruction (2):

• In cases when instructions used to operate on the BPC with the MVTC instruction

are followed by an RTE instruction, do not set a preexecution PC breakpoint for the

RTE instruction. This is because the BPC value becomes illegal and the program

cannot be run normally after a break.

The following shows sample data when the phenomenon occurs.

Example:

Address Instruction

H'100 LD24 R0,#H'100

H'104 MVTC R0,BPC

H'106 NOP

H'110 RTE

If in the above program fragment a preexecution PC breakpoint is set at PC = H'110

to cause a break, the BPC value becomes illegal.

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Renesas SDI Emulator System M32100T-EZ-E Manual de usuario Pagina 5