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IMPORTANT
Note on Usage in Memory Expansion or Microprocessor Mode:
•When you use this product in memory expansion or microprocessor mode, be sure
to design your system so that pins RDY* and HOLD* are not active at startup.
Otherwise, it cannot startup normally.
Note on Accessing Address 00000h:
• With the M16C Series MCUs, when a maskable interrupt is generated, the interrupt
data (interrupt number 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 address 00000h is generated excluding
the interrupt, the WARNING LED (yellow) lights up to alarm. When this LED
lights, there is a possibility of wrong access, therefore check the user program.
Note on the Target Status POWER LED:
• If your MCU has two or more Vcc terminals, the LED does not light unless power
is supplied to all the terminals.
Note on the Target Status CLOCK LED:
• If the LED is not turned on, check the following.
(1) After powering on the PC7501 (before starting up the emulator debugger):
Make sure that the oscillator circuit board is properly installed in the PC7501 and
it is oscillating normally.
(2) After the emulator debugger is started up (after the Init dialog box settings are
completed):
Make sure that the oscillator selected in the Init dialog box is oscillating normally.