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 serial interface in case of the External SPI
Flash.
So, the required time is more when the device boots from
External SPI Flash.
Related Articles
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 ...
2043 - LatticeXP2: Can the CSSPIN pin be used as a GPIO in dual-boot mode on the LatticeXP2 device?
Description: When using the LatticeXP2 device in dual boot mode, the FPGA continuously drives the CSSPIN high. The CSSPIN is considered a dual-purpose pin. However while the CFG0 pin = 0, controlling the dual-boot function, it will cause CSSPIN to be ...
7757 - 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) ...
1834 - MachXO2: When using the device in Dual-Boot configuration mode, what address should the 'Golden' bitstream image (.bit file) be stored in the external Slave-SPI device?
The 'Golden' bitstream image must be located starting at SPI address 0x010000. If using Lattice ispVM System 18.0 or later, the starting address for the bitstream is entered in the "Starting Address" box of the 'SPI Serial Flash Device' dialog box. ...
3287 - MachXO2: In Dual Boot Programming mode, does programming the external flash erases the internal flash; and does programming the internal flash leave the external flash intact?
Programming the external flash erases the internal flash. However, programming the internal flash does not affect the external flash. For a detailed procedure on dual boot programming, refer to the Dual Boot Demonstration section in EB61, MachXO2 ...