Renesas SDI Emulator System M32100T-EZ-E Información técnica descargar pdf (Pagina 9)

(4) Other cautions and restrictions dependent on MCU model

IMPORTANT

z 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

H'100

H'104

H'106

Instruction

LD24

MVTC

NOP

R0, #H'100

R0, BPC

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.

z 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

H'100

H'104

H'106

H'110

Instruction

LD24

MVTC

NOP

RTE

R0, #H'100

R0, BPC

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 Información técnica Pagina 9