Hello,
Does anyone know what exactly is the NVCM of an ICE40 device? Is it OTP or how many times can I program it?
I know ICE65 is OTP, but how about ICE40? A Lattice white paper suggests it is MTP, but that only says Lattice NVCM, not mentioning any specific product. On the other hand, Silicon Blue says their ICE65 is only OTP. What about ICE40?
Also, I want to know how to program those chips? I don't want to spend 160+ USD into a programming cable. They say it can be done via any SPI controller, but they didn't provide any information except for 5 ambiguous waveforms in their one application note.