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M306H7T3-RPD-E User’s Manual 4. Hardware Specifications
REJ10J0964-0100 Rev.1.00 August 01, 2005 Page 79 of 88
IMPORTANT
Note on Power Supply to the User System:
Pins Vcc1 and Vcc2 are connected to the user system to observe the voltage. Therefore, the power is
not supplied to the user system from the emulator, design your system so that the user system is
powered separately.
(1) The voltage of the user system should be within the operating range of the evaluation MCU.
(2) Do not change the voltage of the user system after turning on the power.
Notes on Address-Match Interrupts:
To debug address-match interrupts, set a software break or hardware break at the top address of the
address-match interrupt process. If you set a software break or hardware break at an address where an
address-match interrupt occurs, the program may run out of control.
When an address at which an address-match interrupt occurs is executed in single-step mode, the
program stops after executing the first instruction after returning from the address-match interrupt
processing.
Note on Accessing Addresses 00000h and 00001h:
With the M16C/60 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 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 the address 00000h or 00001h is generated excluding the
interrupt, the LED (yellow) lights up to alarm. When this LED lights, there is a possibility of wrong
access, therefore check the program. This LED is turned off by the system reset switch of the emulator
main unit.
Note on Debugging Operations After Releasing a Reset from the Target:
Do not execute debugging operations such as setting a software or hardware break, runtime debugging
after releasing a reset from the user system until an interrupt stack pointer (ISP) is set in the user
program.