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prudhvichitturi
Associate III
October 13, 2023
Solved

clock cycles needed for eeprom write

  • October 13, 2023
  • 6 replies
  • 2143 views

Hello , 

i am looking to know for STM32L051 how long will it take a byte to be written in to eeprom.

while writing eeprom does it have any limitations like UART intteruptions?

 

This topic has been closed for replies.
Best answer by Tesla DeLorean

Use a TIM counting off micro-seconds to measure the time across the functions. Or toggle a GPIO and scope it

6 replies

TDK
TDK
October 13, 2023

If it's the same as the STM32L1 family (which it probably is), it will not stall the bus unless you read/write to the same bank before the first operation is done.

Datasheet says programming time is 3.94 ms max.

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Piranha
Piranha
Principal III
October 14, 2023

Ironically that time is about 10 to 100 times worse than for a software EEPROM emulation or a proper storage system in FLASH memory.

    prudhvichitturiAuthor
    Associate III
    October 23, 2023

    The below is the function i use , 

     

     flash_unlock( );
    memcpy( &data_w, data_ptr, sizeof( data_w ) );
    status = HAL_FLASHEx_DATAEEPROM_Program( TYPEPROGRAMDATA_WORD, Address_Src, INVERTED_DATA( data_w ) );
    flash_lock( );

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