Renesas M30220TF-PRB Note on Clock Supply to the MCU:, Notes on NMI* Input:, Notes on Interrupts:, Notes on DMA Transfer:

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IMPORTANT

Note on Clock Supply to the MCU:

•Clock can be supplied to the evaluation MCU in one of the following two ways. This is determined

by emulator debugger clock selection.

(1) When "Internal" is selected:

The clock generated by the oscillation circuit in the emulation pod is supplied to the evaluation

MCU. The clock is continually supplied to the evaluation MCU regardless of "the state of

target system clock" and "the state of target program execution".

(2) When "External" is selected:

Clock supply to the evaluation MCU depends on the state of oscillation (oscillate/off) of the

target system.

Notes on NMI* Input:

•NMI* input from the target system is accepted only while a target program is being executed (i.e.,

only while the RUN status LED on the PC4701's front panel is lit).

•The NMI* interrupt is generated in the following situations.

(1) Immediately after the NMI* pin changes from "H" to "L" level during target program

execution

(2) Immediately after the reset from the target system is released with the NMI* pin "L" level

during target program execution

(3) Immediately after program execution starts with the NMI* pin "L" level, following the reset

is input from the debugger software or emulator

(4) Immediately after program execution starts with the NMI* pin "L" level, when the NMI* pin

is "H" level immediately before the target program stops

Notes on Interrupts:

•Even while the target program is not being executed (i.e., even when the target program is paused

or while debug programs are running), the evaluation MCU is operating for controlling debug

programs. Therefore, take note that timers and other functions do not come to a halt when the target

program is not executed.

•If a maskable interrupt is requested while a target program is not being executed (when the target

program is paused or while debug programs are running), the interrupt is not accepted, because the

emulator disables maskable interrupts. If a maskable interrupt is requested while a target program

is not being executed and the program allow the interrupt, the interrupt is accepted immediately

after the target program execution is started.

Notes on DMA Transfer:

•If a DMA request occurs by a timer or other source when the target program is not being executed

(i.e., even when the target program is paused or while debug programs are running), DMA transfer

is executed.

•Make note of the fact that DMA transfer while the target program is stopped may not be performed

correctly.

•Note that the below registers are changed if DMA transfer is generated even when not executing