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DM814x: SPI block size for SPI boot

Chris Meng
Mastermind 38136 points


Hi,

In TRM, it means that for SPI boot, the RBL will check the first 4 blocks of SPI Flash/eeprom.

What's the size of block of SPI ROM code refers to?

I found the block size is 64KB for the SPI flash used on EVM. But for S25FL129P, it is Backward compatible with the S25FL128P (uniform 256 KB sector). So the block size is 64KB or 256KB. I am not sure if the ROM code will only 64KB for the block size or not. Would you pls help to confirm?

  • 0
    TI__Expert 6175 points

    Chris,

    For purposes of booting, one sector is 512 bytes. This is different from the block sizes mentioned in the SPI device data sheet - the sizes mentioned there are important from a  flashing and erasing perspective.

    The ROm always trarts one block as 512 bytes.

    Regards,

    Madan