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Looking for fast startup STM32

Question asked by Zheng Liang on Dec 21, 2017

We have a project that using a wiegand sensor to power the mcu and update the counter to FRAM through SPI. there will be a 10us width regulated power supply from wiegand, all the process need to be done in 10us with below sequence:

  1. power on STM32 and FRAM
  2. read value of counter from FRAM
  3. increase/decrease counter
  4. store new value to FRAM

 

If you have the selection suggestion of STM32 or other arm factory, please let me know, thanks.

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