Hi Andrew, This probably isn't too important, Most (all?) parallel flash can jive with TTL levels (ie. >= 2V is high, <= 0,8V is low, in-between is garbage).
eg. this datasheet (29F002) - see the Vil and Vih specifications. http://www.datasheetcatalog.org/datasheets/150/489768_DS.pdf However, it is essential that VCC be 5V, give or take. 3,3V will cause errors. Are you saying Vcc is 3,3V? Or just the data/addr lines? -Mark On Mon, Jun 7, 2010 at 7:29 PM, Andrew Morgan <[email protected]> wrote: > On 08/06/10 01:29, Andrew Morgan wrote: >> >> I have set it to 128K now, see comment in patch. I hope the comment is ok. >> > The 128KB comment might not be needed any more. It seems that 128KB is the > correct maximum size. > Using a multimeter I found that the voltage on A16 does change during a > read. The other thing I found is that the network card uses 3.3v for the > boot ROM, not 5v! As I have been doing all my tests with a 5v±10% 256KB > flash chip, and one of the address lines was floating, I'm not surprised > there was random data being read. (I am surprised that erase seemed to > work.) > > So now all I need to do is find a 128KB 3.3v DIP32 parallel flash chip... > > -- > > Andrew. > > > _______________________________________________ > flashrom mailing list > [email protected] > http://www.flashrom.org/mailman/listinfo/flashrom _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
