Renesas M30290T-EPB User Manual page 21

(2) Target Status LEDs
The target status LEDs indicate operating status of the target MCU and power supply of the user system. Table 2.4 lists
the definition of each target status LED.
Table 2.4 Definition of the target status LEDs
Name Status
POWER ON
OFF
CLOCK ON
OFF
RESET ON
OFF
RUN ON
OFF
WARNING ON
OFF
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.
Note on Accessing Addresses 00000h and 00001h:
With the M16C/Tiny Series MCUs, when a maskable interrupt is generated, the interrupt data (interrupt
number and interrupt request level) stored in addresses 00000h and 00001h are read out. Also, the
interrupt request bit is cleared when address 00000h or 00001h is read out. Consequently, when the
address 00000h or 00001h readout instruction is executed or when address 00000h or 00001h 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 or 00001h 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.
Power is supplied to the user system.
Power is not supplied to the user system.
Target MCU clock is oscillating.
Target MCU clock is not oscillating.
Target MCU is being reset.
Target MCU is not being reset.
User program is being executed.
User program has been halted.
Address 00000h or 00001h has been read out.
Address 00000h or 00001h has not been read out.
IMPORTANT
Meaning
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Chapter 2. Preparation