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What is the difference between interrupt Raw status register and interrupt status register on LPC3250?
yes. i got this point from user manual. but my question is are we need to check this register before enable interrupt on ER register. Is this make any difference if we won't check? For interrupt on GPIO i used RSR interrupt to acknowledge. but in timer we have TnIR to acknoledge. how can we use this registar?
The normal approach would be to fully initialise the source of the interrupt before enabling the interrupt. That initialisation would clear (release) any old pending interrupt.
Thank you. i got the difference.