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Linux/AM5716: Booting from NOR flash with 8-WSON package

Francesco Residori
Intellectual 460 points
Part Number: AM5716


Tool/software: Linux

Hi,

I'm making a new design with SItara AM5716. The booting sequence is QSPI_4 - SD - USB (SYSBOOT[5:0] = 0b100111).

QSPI_4 is connected to a NOR Flash (8-WSON package) as shown in the picture below

I've connected the RESET#/SIO3 pin to QSPI_D3. Flash memory doesn't have a dedicated reset pin.

Is this schematics right or I must connect the RESET# to a dedicated pin of the Sitara?

  • 0
    TI__Guru**** 393215 points
    Hi,

    Make sure you follow the guidelines given in section 8.6.2 of the AM571x Datasheet Rev. F.

    As for the reset pin, this is connected to the system reset on the AM571x IDK. Obviously this won't work in your case. What you should do is use AM571x pin T2 in GPIO mode to reset the memory, then switch it to QSPI mode. However if you want to boot from QSPI you must ensure that this memory is internally reset on power-on, as the above method won't be possible at boot time.
  • 0 in reply to Biser Gatchev-XID
    Intellectual 460 points
    Flash memory has a internal power-on reset (POR) circuit.
    If I need to reset it after power-up, I'll do it with pin T2.

    Thank you!
    Best Regards