Renesas M16C/6NN Manuel d'utilisateur télécharger pdf (Page 22)

E8a Emulator Section 6 Notes on Using the E8a Emulator

18. Exceptional step execution

a) Software interrupt instruction

Step execution cannot be performed in the internal processing of instructions (undefined, overflow, BRK and

INT) which generate a software interrupt continuously in the program.

Example: INT instruction

b) INT instruction

To debug the user program with the INT instruction, set a PC break for the internal processing of the INT

instruction and execute the program with the GO command.

Example:

19. “Go to cursor” function

The “Go to cursor” function is actualized using an address match break. Therefore, when you execute the “Go to

cursor” command, all the address match breaks you set become invalid, while all the PC breaks remain valid.

20. Note on PC break point

When downloading a user program after modifying it, the set address of PC break may not be corrected normally

depending on the modification. Therefore, break points other than the set PC breaks may shift. After downloading

a user program, check the setting of PC breaks in the event point window and reset it. If a low-speed clock such as

the sub clock is used as the operation clock of the MCU, setting or canceling PC breaks may take time. Use address

match breaks as the first choice.

REJ10J1640-0400

Rev.4.00 Page 19 of 31

NOP

INT #3

NOP

JMP MAIN

INT_3:

NOP

REIT

Program should be stopped at this address.

Passes through if the STEP execution is carried out.

NOP

INT #3

NOP

JMP MAIN

INT_3:

OP Break

REIT

Execute using GO command.

Apr 30, 2010

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Renesas M16C/6NN Manuel d'utilisateur Page 22