Hardware interrupt frequenzy

Using Arduino Microcontrollers
1

Hi

Can anybody tell me the max. frequenzy which an interrupt pin from an atmega328pu can follow? I want to count increments of an angle sensor. (200kHz)
Thanks

2

Interrupts take a minimum of 3 microseconds. Your interrupt rate is 1 every 5 microseconds. That leaves 2 microseconds to do the body of your interrupt. That's about 32 instruction cycles so it should be possible.

Did you know that Timer1 has an external counter input? See Table 15-5. Clock Select Bit Description

3

Thanks for your great help