M30870T2-CPE User’s Manual
4. Hardware Specifications
REJ10J0766-0400 Rev.4.00 February 16, 2006
IMPORTANT
Note on Software Breaks:
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.
Notes on Service-Life of the MCU’s Internal Flash ROM:
With the M30870T2-CPE, programs are downloaded to the MCU’s flash ROM when debugging in single-chip
mode or memory expansion mode. Because the number of write/erase cycles of this ROM is limited, the ROM
must be replace when at the end of its service-life.
If the following errors occur frequently during program download, replace the MCU board.
Flash ROM erase error occurred ERROR (16258)
Flash ROM verify error occurred ERROR (16259)
To purchase the product for replacement or request for repair, contact your local distributor.
Note on Voltage Detect Circuit:
With the M30870T2-CPE, as the power voltage cannot be change after powering on the user system, the
voltage detect circuit (voltage down detect interrupt and hardware reset 2) cannot be used with this product.
Note on Protect Register:
A protect is not canceled when protect register bit 2 (PRC2), which enables writing in the port P9 direction
register and the function select register A3, is changed with the below procedure.
(1) Step execution of an instruction setting PRC2 to "1"
(2) Setting a break point from an instruction setting PRC2 to "1" to where the port P9 direction register or the
function select register A3 is set
(3) Setting (“1”) PRC2 from the dump window or script window during use program execution
Note on Memory Access:
When setting memory expansion mode as a processor mode, it may be changed to memory expansion mode
temporarily before the user program itself changes from single-chip mode to memory expansion mode.
Take due consideration on this phenomenon in the following cases:
(1) Immediately before executing the program after setting a software break
(2) Immediately after stopping the program when a software break is set
Page 91 of 102
Summary of Contents for M30870T2-CPE
Page 102: ...M30870T2 CPE User s Manual ...
