On Mon, Nov 30, 2015 at 12:53 AM, Krzeminski, Marcin (Nokia - PL/Wroclaw) <marcin.krzemin...@nokia.com> wrote: > Hello, > > I need to write some SPI eeprom device model (probably AT25128B or AT93C56). > I can not see any such device in qemu, but this time I want to ask before I > start to implement, > if something that can speed up work is already present somewhere ? > Maybe do you have some preferences which eeprom device is better to have in > qemu? >
So some of those EEPROM devices are nearly identical to M25P80 in functionality, the main difference being that individual cells can be programmed from 0 back to 1. A quick look at a AT25128B datasheet looks like this may be the case. Read and write instructions as the same encoding as M25P80. Search m25p80 for WR_1, which is a flag you can set that allows write of 1 to individual bits. I think can become a feature of M25P80 (more table entries) if the basic instructions are just an M25P80 subset. HTH Regards, Peter > Regards, > Marcin
