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IMPORTANT
Note on Reading Internal Resources of the MCU:
• When the registers that are listed in Table 1.1 are read with an emulator, those results will be the
following (the data in the MCU are not effected).
(1) Results of real-time trace
The data values of the cycles read are not displayed correctly.
(2) Real-time RAM monitor
The data values read are not displayed correctly.
Table 1.1 Resisters and symbols not displayed normally
Resister Symbol
DMA source pointers 0, 1 SAR0, SAR1
DMA destination pointers 0, 1 DAR0, DAR1
DMA transfer counters 0, 1 TCR0, TCR1
DMA control resisters 0, 1 DM0CON, DM1CON
Note on Protect Register (PRC2):
•Make note of the fact that the protect is not canceled when protect register (PRC2), which enables
writing in the port P9 direction register and the SI/Oi control register, is changed with the below
procedure.
(1) Step execution of the "instruction for setting ("1") PRC2"
(2) Setting the break point from the instruction for setting ("1") PRC2 to when the port P9
direction register and SI/Oi control register are set.
(3) Setting "("1") PRC2" from the dump window or script window
Note on Accessing Address 00000h:
• When a maskable interrupt is generated, the interrupt data (interrupt No. and interrupt request level)
stored in address 00000h is read out. Also, the interrupt request bit is cleared when address 00000h
is read out. Consequently, when the address 00000h readout instruction is executed or when
address 00000h is read out in the cause of a program runaway, a malfunction occurs in that the
interrupt is not executed despite the interrupt request, because the request bit of the highest priority
interrupt factor enabled is cleared.
For this malfunction, when the reading out to the address 00000h is generated excluding the
interrupt, the yellow LED lights up to alarm. When this LED lights, there is a possibility of wrong
access to address 00000h, therefore check the program. This LED is turned off by the system reset
switch of the emulator main unit.