Renesas Emulation Probe for M32C/88 Group M30880T-EPB - Manual (Page 89)

M30880T-EPB User’s Manual 4. Hardware Specifications
REJ10J0497-0100Z Rev.1.00 January 16, 2005 Page 89 of 100
IMPORTANT
Notes on Debugging in CPU Rewrite Mode:
To debug a program in CPU rewrite mode, select the check box "Debug the program using the CPU Rewrite
Mode" in the MCU tab of the Init dialog box. When you do not debug a program in CPU rewrite mode, clear
the check box.
When you debug a program in CPU rewrite mode, the block 0 area (FFF000h--FFFFFFh) must not be rewritten.
Otherwise, the emulator will be out of control.
When debugging in CPU rewrite mode is enabled, you cannot use the following functions.
(1) Setting an address match breakpoint
(2) Setting a software breakpoint to the internal ROM area
(3) Executing COME to the internal ROM area
Do not use the following functions to the rewrite control program area (from setting CPU rewrite mode select
bit to releasing it). If any of these are used, malfunctions may occur (e.g. The emulator cannot shift to CPU
rewrite mode or contents of ROM cannot be read out properly.).
(1) Single stepping
(2) Setting a software breakpoint
(3) Setting a hardware breakpoint
(4) Executing COME
Note on Software Break:
A software break generates a break interruption by forcibly inserting a BRK instruction "08h" instead of an
instruction code. Therefore, when referencing the result of a trace in bus mode, "08h" is displayed for the
instruction fetch address where a software break is set.
Note on Downloading Programs:
When you download a program to an internal ROM area and set software breaks, the main clock operates in
divide-by-8 mode. Keep it in mind when you specify a watchdog timer refresh interval.
Notes on Service-Life of the MCU's Internal Flash ROM:
With the M30880T-EPB, programs are downloaded to the MCU's flash ROM when debugging in single-chip
mode. Because the number of write/erase cycles of this ROM is limited, the ROM must be replaced when at the
end of its service-life.
If the following errors occur frequently during program download, replace the emulation probe or request for
repair.
(1) Flash ROM erase error occurred ERROR (16258)
(2) Flash ROM verify error occurred ERROR (16259)
To purchase the product for replacement or request for repair, contact your local distributor.