5.2 The device does not boot on some QSPI memories

A bug in the ROM code can prevent toggling some QSPI memory models into Quad SPI mode (1-4-4) before issuing a (1-4-4) fast read quad I/O command. As a result, booting is not possible using these memories.

Work Around

Use a memory with Quad mode enabled by default (for example, using an SST26VF064BA model instead of an SST26VF064B model).

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