How does low level interrupt works? There is no interrupt flag to that?? Devise is ATTiny28V. Thanks...
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This term refers to the level of the input pin dedicated to external interrupts. If the voltage level of the pin is pulled low, and the MCUCR register is set up to invoke the interrupt service routine on low level input, then the program counter will jump to the external interrupt vector.
The alternatives to low level interrupt are rising and falling edge. I hope I've been able to help you.
Morten, AVR tech. support, Atmel FAE
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