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AM2612: QSPI flash support in OSPI interface

Vishnu Jayaraj
Prodigy 245 points
Part Number: AM2612

Tool/software:

Hi,

We are planning to interface QSPI flash in OSPI in AM2612.

256Mb flash (IS25LP256E-JLLE) will be connected to OSPI.

Since it is of 256Mb do we need to use reset from OSPI interface itself for flash memory reset?

The Reset in Flash IC is configured as DATA3 in QSPI mode

Regards

Vishnu

  • 0
    TI__Expert 3080 points

    Hi Vishnu,

    Apologies for the delay,

    Vishnu Jayaraj said:
    Since it is of 256Mb do we need to use reset from OSPI interface itself for flash memory reset?

    Yes, If the Flash memory is larger than 16MB (128Mb), then a flash device package with support for a RESET signal is required to prevent a device warm reset from affecting ROM code execution.

    Thanks & Regards,
    Rijohn

  • 0 in reply to Rijohn Pius
    Prodigy 245 points

    Hi Rijohn,

    Is there any method to perform a software reset for Flash without a dedicated hardware reset pin?

    Regards

    Vishnu

  • 0 in reply to Vishnu Jayaraj
    TI__Expert 3080 points

    Hi Vishnu,

    Vishnu Jayaraj said:

    ,

    Is there any method to perform a software reset for Flash without a dedicated hardware reset pin?

    While Flash memory does support software-based reset functionality, microcontroller (MCU) systems operate differently.  As said in the previous TRM snippet shared by you "ROM DOES NOT ISSUE A SOFTWARE RESET COMMAND". Due to this ROM expects flash to be reset properly before it start to access contents of FLASH. Hence we should use a flash with Dedicated RESET pin is flash size if above 16 MBytes


    Thanks & Regards,
    Rijohn