> -----Oorspronkelijk bericht----- > Van: David Brownell [mailto:davi...@pacbell.net] > Verzonden: donderdag 14 mei 2009 23:02 > Aan: Nico Coesel > CC: openocd-development@lists.berlios.de; Raúl Sánchez Siles > Onderwerp: Re: [Openocd-development] CFI driver chip/bus width. > > On Thursday 14 May 2009, Nico Coesel wrote: > > Anyway, if your flash is 8 bit, then your bus must be > > 8 bits wide. > > Not true; there *is* support, e.g. in Linux, for hooking up > two 8-bit NOR chips in parallel. I think one of the ideas is > to improve the read/write bandwidth.
Two 8 bit flash chips in parallel won't be faster than 1 16 bit flash chip. Anyway, Linux won't care where the data is coming from. What does matter is that an 8 bit device must be connected to an 8 bit data path. So if your data path is 16 bits wide you need to have two 8 bit flashes in parallel otherwise your data will be corrupted (8 bits missing). > > It is not clear whether you have two 8 bit flashes in > > parallel to form a 16 bit flash. > > Two 8-bits in parallel is different from one 16-bit chip. That is exactly what I was trying to type :-) Nico Coesel _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
