1142 - ispVM: How to generate a LatticeXP and LatticeXP2 device bit file for EPROM programming?
Unlike using bitstream file *.bit like LatticeSC or LatticeECP3 family, LatticeXP and LatticeXP2 have JEDEC file output format for programming.
When using ispVM to program device through JTAG interface, there is no extra step.
But to program a EPROM, the bitstream need to be in bit format.
For LatticeXP device, the bit format file is generated at the same time
when JED is generated. Thus no extra step is required.
For LatticeXP2, the bit file is not generated at the same time as when the JED file
is generated. There is an extra step that is required to generate the bit file.
In ispVM toolbox, there is a tool called UFW(universal file writer), which can convert
the JEDEC file into bit file. This is a necessary step to create a bit file for EPROM programming.