DESCRIPTION When programming Lattice FPGA devices via SPI Flash using a JTAG chain, the Erase-Program-Verify (EPV) operation fails deterministically starting from the 7th device in the chain. Chains of 6 devices or fewer complete SPI Flash EPV ...
iCE40 does not support daisy chain programming. However, since programming is through SPI interface, SPI_SO, SPI_SI, SPI_SCK, and CRESET_B pins can still be connected on the same bus. SPI_SS pins should be separated which are controlled by the ...
Solution: The Lattice ispVM System software supports multi-chain BSCAN2 designs as described in the application notes AN8081 and AN8083 at: For other types of multi-drop JTAG designs, third party tools have been shown to be of help to connect the ...
For the encrypted bitstream to work in LatticeECP2/S device, ensure the following: For power-up, VCC must reach its valid minimum value before powering up VCCAUX (LatticeECP2/M āSā version devices only). Refer to LatticeECP2/M Family Data Sheet for ...