M3028BT2-CPE User’s Manual
4. Hardware Specifications
REJ10J1457-0300 Rev.3.00 July 22, 2009
Page 79 of 90
IMPORTANT
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 M3028BT2-CPE 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.
Note on Stop and Wait Modes:
z
Do not single step an instruction shifting to stop or wait mode. It may cause communications errors.
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.
When this product is used with connecting to the user system, be sure to set as follow:
CNVss:
Low
Note on Breaks:
z
The following three breaks can be selected in the emulator debugger.
(1) Address-match break
This is a debugging function which breaks a program, using the address-match interrupt function of the
MCU, immediately before the system executes an instruction at a specified address. The instruction at the
preset address will not be executed.
(2) Software break
This is a debugging function which generates a BRK interruption by changing an instruction at a specified
address to a BRK instruction (00h) to break a program immediately before the system executes an
instruction at a specified address. The instruction at the preset address will not be executed.
(3) Hardware break
This is a debugging function which breaks a program by setting the detection of an execution of an
instruction at a specified address as a break event. The program will break after the instruction at the
specified address is executed.
Notes on Address-Match Breaks:
z
As the processing speed of setting and canceling address-match breaks is relatively fast, you can save the times
of writing into the internal flash ROM of an MCU. Therefore, address-match breaks precede the other breaks
when setting breakpoints in the internal flash ROM area of an MCU.
z
Address-match breaks can be set up to six points.
z
Address-match breaks can be set or canceled even when the user program is being executed.
