Can stm32f7 generate interrupt with period ns ?

[nguen nguyen]

example generate pulse period 2ns

[AvaTar]

No.

And even if it could generate interrupts at that rate, it couldn't process it.

[After Forever]

In most cases it's not really necessary to have nanosecond (or even microsecond) interrupts. STM32 has robust timers and other periphery which can do many tasks without your manual I/O pin-switching from an interrupt.

But even for the 216MHz clocks of STM32F7 timer 2ns is too much. 216MHz will give you ~4.63ns if my calculations are precise. There is also the GPIO speed limit to take into account, for STM32F7 it's 180MHz (I/O compensation cell should be enabled).

[S.Ma]

Use HW peripheral to time detress and consider power consumption aspect.

[nguen nguyen]

I think this HW peripheral maybe can do it STM32 send 16 bit to mux (16-1)

[AvaTar]

2 ns correspond to 500 MHz. And a Cortex M interrupt usually take 12 clock cycles for entry and exit each.

[nguen nguyen]

thank you very much