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the external interrupt response time

Huang99
Visitor

‎2025-11-04 10:58 PM

     Hi,I want to use STM32G431CB or STM32F411CEU6 to measure the time precisely.I need to know the external interrupt response time of GPIO,but I can not find it in datasheet and manual.can you tell me what is the value if the CPU frequency is 100MHz ?

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gbm
Principal

‎2025-11-05 1:12 AM

For precise time measurement, use timer in capture mode.

The maximum operating frequency may be easily found in the datasheet.

The actual operating frequency is decide on and set by programmer. The maximum is 100 MHz for F411 and 170 MHz for G431.

My STM32 stuff on github - compact USB device stack and more: https://github.com/gbm-ii/gbmUSBdevice
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