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Write protection on SD/QSPI?

rdb98789

I'd like to know if it is possible to make the Microzed "Read Only" in terms of non-volatile memory. That is, the Zynq can still boot from QSPI/SD, but no way for the application SW/FW to write to non-volatile memory. Ideally we'd only allow programming of the QSPI through JTAG. Open to out-of-the-box thinking like board mods.

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  • I am looking at the rev H of the MicroZed board. It has an Infineon S25FL128SAGB QSPI chip.

    The datasheet shows several registers that might be useful for write protection. Chapter 10 talks about data protection. Those are all QSPI commands that set protection bits, which need to be performed after programming. I did not read into details about removing the protection, but this would make it much harder for regular applications to write into the QSPI.

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  • I am looking at the rev H of the MicroZed board. It has an Infineon S25FL128SAGB QSPI chip.

    The datasheet shows several registers that might be useful for write protection. Chapter 10 talks about data protection. Those are all QSPI commands that set protection bits, which need to be performed after programming. I did not read into details about removing the protection, but this would make it much harder for regular applications to write into the QSPI.

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