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M3028BT-EPB User’s Manual 4. Hardware Specifications
REJ10J1459-0200 Rev.2.00 Sep 16, 2006
IMPORTANT
Note on Clock Supply to an 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 Operating Frequency:
z You can not use this product with a main clock (XIN-XOUT) less than 1MHz. To use it with a main clock less
than 1MHz, contact your local distributor.
Note on Timeout Setting:
z At 8MHz or less, when 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. It is set to 30 seconds for downloading, and 30 seconds for
other than downloading.
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 the Watchdog Function:
z If the reset circuit of the user system has a watchdog timer, disable it when using the emulator.
Note on Protect Register:
z The protect is not canceled when bit 2 of protect register PRCR (PRC2), which enables writing into the port P9
direction register and the SI/Oi control register, is changed with the below procedure.
(1) Step execution of an instruction setting PRC2 to "1"
(2) Setting a break point between an instruction setting PRC2 to "1" and a point where the port P9 direction
register or the SI/Oi control register is set
(3) Setting PRC2 to "1" by the memory window or script window
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