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E8a Emulator Section 6 Notes on Using the E8a Emulator

21. Note on debugging in CPU rewrite mode

When debugging in CPU rewrite mode, do not rewrite in CPU block 0 area (addresses FF000h - FFFFFh) and

block containing the E8a emulator program. If these areas are rewritten, the E8a emulator will not control the MCU.

Do not halt the user program while setting up the CPU rewrite mode and releasing it. If halted, the E8a emulator

may not control the MCU. In addition, disable the automatic update in the watch window or fix the display in the

memory window before running the program so memory accesses do not occur during an execution.

To check the data after executing the CPU rewrite mode, halt the program after releasing the CPU rewrite mode

and refer to the memory window, etc.

When rewriting the Flash memory in the program area, select Menu -> [Setup] -> [Emulator] -> [System...] to

open the [Configuration] dialog box in the High-performance Embedded Workshop. In this dialog box, change the

[Flash memory synchronization] setting to [Flash memory to PC] and set the debugger cache to OFF. In this setting,

the Flash memory is read whenever a break occurs, which takes some time. Use it with the [Disable] setting except

when debugging in CPU rewrite mode.

22. Note on lock bits of Flash memory

When starting up in the [Erase Flash and Connect] mode or [Program Flash] mode, lock bits in all the blocks of the

Flash memory will be unlocked. Note that the lock bits of the downloaded blocks will be unlocked after

downloading the user program.

23. Notes on rewriting Flash memory

Do not reset the MCU when rewriting the Flash memory.

The Flash memory is rewritten when the “Flash memory write end” is displayed in the output window of the High-

performance Embedded Workshop. If the MCU is reset when rewriting the Flash memory, the user program or the

E8a emulator program may be disrupted.

Flash memory rewrite occurs:

- When downloading the user program

- After setting PC breaks in the Flash memory and executing the user program

- After canceling PC breaks in the Flash memory and executing the user program

- After rewriting the value of the Flash memory in the memory window and executing the user program

24. Notes on the E8a emulator power supply

When writing a program with the E8a emulator for mass production processes, the program requires reliability, so

do not use the E8a emulator power supply function. Supply power separately to the user system according to the

allowable voltage for MCU writing. Voltage supplied from the E8a emulator depends on the quality of the USB

power supply of the PC, and as such, precision is not guaranteed. Note that when debugging the system which

operates the MCU with a dual power supply, power cannot be supplied from the E8a.

25. Low power consumption mode

When debugging in low power consumption mode, do not operate windows until the program stops at the

breakpoint by setting the breakpoint at the line of the program which will be executed after the low power

consumption mode is cancelled.

REJ10J1640-0400

Rev.4.00 Page 20 of 31

Apr 30, 2010

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Renesas M16C/6NN Manual de usuario Pagina 23