[flashrom] [RFC] JEDEC refactor w/ conversion notes and file eliminations
flashrom at mkarcher.dialup.fu-berlin.de
Sat Dec 26 00:58:50 CET 2009
Am Freitag, den 25.12.2009, 18:09 +0100 schrieb Michael Karcher:
> 11 bits maybe needed:
> AMIC A29002B/AM29002T: [Listed here because 0xAAA would have A11 set
> which is not marked as don't care. Currently, it uses write_jedec_1
> which will fail if the datasheet is correct about A11 being used.]
> Page 11, Note 4 "Address bits A17 - A12 are don't cares for unlock and
> command cycles, unless SA or PA required."
As carldani told in IRC, there is a success report with the A29002B.
This test used a 11-bit erase function (0x555/0x2AA) and a 15 bit probe
and a 15 bit write function (0x5555/0x2AAA). As it worked, this chip is
for sure 11-bits-needed, higher-bits-don't care.
> Macronix MX29LV040: [Currently uses write_jedec_1 which will fail if the
> higher address lines are not ignored.]
> Datasheet does not tell anything about ignored address lines.
This chip also uses probe_29f002 (15 bits)/erase_29f002 (11 bits).
Currently it is declared as probe/read successful; erase/write never was
marked successful in svn since the chip got introduced in r366. As the
data sheet specifies the 11-bit addresses and the 15-bit probe worked,
it is very probable that all address bits starting at A11 are (as usual
for 11 bit chips) don't care.
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