5618 - iCE40: Is it possible to boot from an External Flash if the iCE40 device is already programmed in NVCM mode?
Once the device is programmed in NVCM mode, you will no longer be able to boot from an external Flash. However, you can still configure directly to the SRAM through an external SPI Master such as a Microcontroller. Please refer to FPGA-TN-02001 for more information.
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5779 - iCE40 UltraPlus: Can iCE40 devices be configured in Master SPI or Slave SPI mode if the NVCM has already been programmed?
When the NVCM of an iCE40 device has already been programmed, it can no longer be configured in Master SPI mode (SPI serial Flash PROM). However, Slave SPI is still possible which could be an external device, such as a processor, microcontroller, or ...
6259 - iCE40 LP/HX: Is it possible to determine if NVCM has already been programmed on the iCE40 device?
Solution: To verify whether the NVCM was previously programmed, perform a Blank Check on the NVCM Arrays
Radiant Programmer: What is Erase, Program, Verify Quad 1 operation used for?
Description: Erase, Program, Verify Quad 1 enables that QE bit to '1'. In general, there are two (2) requirements/steps to enable booting from external SPI Flash through x4 (QUAD Mode) Step 1 - Convert the bitstream file into hex (Quad I/O read mode) ...
3817 - LatticeXP2: Is the download/configuration time from Internal/External SPI Flash different while using Dual Boot Mode in LatticeXP2 device?
While using Dual Boot Mode, the configuration time (time required for the bitstream to get configured inside the device) from Internal Flash is less. Data transfer is faster because the Internal Flash interface with SRAM is parallel, whereas it is a ...
1663 - MachXO2: How can I force to boot from the “golden boot” image in the external SPI Flash when using the dual boot feature?
The MachXO2 has a dual boot feature that works in an automatic mode. If the image loaded from the internal flash is found to have an issue (CRC error), or if the internal flash is erased, then the part will automatically try to load the golden image ...