Renesas M306NKT-EPB Manual de usuario descargar pdf (Pagina 12)

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IMPORTANT

Note on RDY* Input:

z Be sure to input a low to pin RDY* of the user system during the user program execution (only while

the RUN status LED on the PC7501's upper panel is lit). Inputting a low signal to pin RDY* when the

user program is stopped may cause a malfunction of the emulator.

Note on HOLD* Input:

z Be sure to input a low to pin HOLD* of the user system during the user program execution (only while

the RUN status LED on the PC7501's upper panel is lit). Inputting a low signal to pin HOLD* when the

user program is stopped may cause a malfunction of the emulator.

Notes on Maskable Interrupts:

z Even if a user program is not being executed (including when run-time debugging is being performed),

the evaluation MCU keeps running so as to control the emulation probe. Therefore, timers and other

components do not stop running.

If a maskable interrupt is requested when the user program is not being executed (including when

run-time debugging is being performed), the maskable interrupt request cannot be accepted, because the

emulator disables interrupts. The interrupt request is accepted immediately after the user program

execution is started.

z Take note that when the user program is not being executed (including when run-time debugging is

being performed), a peripheral I/O interruption is not accepted.

Note on Clock Supply to the MCU:

z A clock supplied to the evaluation MCU is selected by the Emulator tab in the Init dialog box of the

emulator debugger.

(1) When "Internal" is selected:

A clock generated by the oscillator circuit board in the PC7501 is supplied. It is continually

supplied regardless of the status of the user system clock and that of the user program execution.

(2) When "External" is selected:

A clock generated by the oscillator in the user system is supplied. It depends on the status of the

oscillation (on/off) of the user system.

(3) When "Generate" is selected:

A clock generated by the dedicated circuit in the PC7501 is supplied. It is continually supplied

regardless of the status of the user system clock and that of the user program execution.

Note on Access Prohibited Area:

z You cannot use internally reserved areas. Write signals to the areas will be ignored, and values read will

be undefined.

Notes on Stack Area:

z With this product, a maximum 8 bytes of the user stack is consumed as a work area.

Even if the user stack does not have an enough area, do not use areas which cannot be used as a stack

(SFR area, RAM area which stores data, or ROM area) as a work area. Using areas like this is a cause of

user program crashes and destabilized emulator control.

z With this product, the interrupt stack pointer (ISP) is set at 00500h and used as a stack area after a reset

is released.

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Renesas M306NKT-EPB Manual de usuario Pagina 12