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M306NKT-EPB User’s Manual 4. Hardware Specifications
REJ10J0519-0200 Rev.2.00 Oct. 16, 2006 Page 92 of 104
IMPORTANT
Note on Display of MCU Status:
z "MCU status" you can refer to in the MCU tab of the MCU Setting dialog box of the emulator debugger shows
pin levels of the user system. Make sure that proper pin levels are specified according to the mode you use.
(1) When single-chip mode is used:
CNVss: Low
(2) When memory expansion mode 16-bit data bus width is used:
CNVss: Low, BYTE: Low, HOLD#: High, RDY#: High
(3) When memory expansion mode 8-bit data bus width is used:
CNVss: Low, BYTE: High, HOLD#: High, RDY#: High
(4) When microprocessor mode 16-bit data bus width is used:
CNVss: High, BYTE: Low, HOLD#: High, RDY#: High
(5) When microprocessor mode 8-bit data bus width is used:
CNVss: High, BYTE: High, HOLD#: High, RDY#: High
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 "Generated" is selected:
A clock generated by the dedicated circuit in the PC7501 is supplied to the evaluation MCU. It is
continually supplied regardless of the status of the user system clock and that of the user program execution.
Note on Operating Frequency:
z You can not use this product with a main clock (X
IN
-X
OUT
) less than 1MHz. To use it with a main clock less
than 1MHz, contact your local distributor.
Note on Timeout Setting:
z If you download, execute or single-step a program at a low operating frequency, a communication timeout error
may occur.
Execute the command shown below in the Script Window after starting the emulator debugger.
[Command]
_settimeout 300, 300
Once this command is executed, it remains effective the next time you start the emulator debugger. Therefore,
you do not need to execute this command again.
If the error still occurs in this setting, contact your local distributor.
Note on Stop and Wait Modes:
z Do not single step an instruction shifting to stop or wait mode. It may cause communication errors.
Note on Returning from Stop Mode with the On-chip Oscillator Clock:
z When this product shifts from on-chip oscillator mode or on-chip oscillator low power dissipation mode to stop
mode, it cannot be returned with an interrupt other than the NMI#.
Interrupts with which this product cannot return:
- Key input interrupt
- INT interrupt
- Interrupts of timers A and B
- Serial I/O interrupt