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A mechanism for the control of program flow in a computer. When interrupted a computer saves its present operational state and changes to executing code (interrupt handler) that is dependent upon which interrupt was generated. Interrupts can be either hardware- or software-sourced; software-sourced interrupts are called traps. It is an alternate mechanism to polling and is the basis around which most I/O, multitasking and control is implemented.

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ATtiny13A - Can't generate software PWM with CTC mode

Even after 4 years perhaps still useful: I'm not sure with what registers and setting you tried for hardware PWM, but perhaps the code in my FastPwmPin library is useful (see Github). I have tested ha …
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