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Note on DMAC II Transfer Completion Interrupts:
•You can use DMAC II transfer completion interrupts during program execution only. Do not
generate DMAC II transfer completion interrupts when you use any function but program
execution.
IMPORTANT
Note on DMA Transfer:
• With this product, the user program is stopped with a loop program to a specific address. Therefore,
if a DMA request is generated by a timer or other source while the user program is stopped, DMA
transfer is executed. However, make note of the fact that DMA transfer while the program is
stopped may not be performed correctly. Also note that the below registers have been changed to
generate DMA transfer as explained here even when the user program is stopped.
DMA0 transfer count register DCT0
DMA1 transfer count register DCT1
DMA0 memory address register DMA0
DMA1 memory address register DMA1
DMA2 transfer count register DCT2 (R0)
DMA3 transfer count register DCT3 (R1)
DMA2 memory address register DMA2 (A0)
DMA3 memory address register DMA3 (A1)
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 M30850T-EPB, 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 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.
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:
•As the power voltage cannot be changed after powering on the target system, the voltage detect
circuit (voltage down detect interrupt and hardware reset 2) cannot be used with this product.