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M301N2T-PRB User’s Manual 
4. Hardware Specifications   
REJ10J0037-0100 Rev.1.00 Mar.16, 2005 
 
Page 34 of 48 
 
 
IMPORTANT
 
Note on RESET* Input: 
 
 
"L" level input from the user system to pin RESET* is accepted only while a user program is being 
executed (only while the RUN status LED on the PC4701's front panel is lit). 
 
Notes on Maskable Interrupts: 
 
 
Even if a user program is not being executed (including when run-time debugging is being performed), 
the evaluation MCU keeps running so as to control the emulation pod. If a maskable interrupt is 
requested when the user program is not being executed (including when run-time debugging is being 
performed), the maskable interrupt request cannot be accepted, because the emulator disables 
interrupts. The interrupt request is accepted immediately after the user program execution is started. 
 
Take note that when the user program is not being executed (including when run-time debugging is 
being performed), a peripheral I/O interruption is not accepted. 
 
Note on Final Evaluation: 
 
 
Be sure to evaluate your system with an evaluation MCU. Before starting mask production, evaluate 
your system and make final confirmation with a CS (Commercial Sample) version MCU.