The Dual Boot feature is supported through the Master SPI Mode(MSPI) for MACHXO2 device. During the device configuration at power up or toggling of PROGRAMN pin, any of following situations will trigger a dual boot event.
- A bitstream Cyclic Redundancy Check(CRC) error is detected from on-chip Flash memory.
- A time-out error is encountered when loading from on-chip Flash.
For more information on Dual Boot Function in the MachXO2, please see TN1204, "MachXO2 Programming and Configuration Usage Guide".