Heard about it with the Motorola 6811 and Hitachi 6811 (equivalents),=20
but that was a while back concerning EEPROMs. Also heard Microchip had=20
trouble with it's 1st flash versions which is why Atmel had a large=20
lead on flash parts but I don't know if that is or was true and have=20
nothing to back that up with.


  I experienced this with Atmel devices 89c51 on a very  simple hardware =
designed by third party provider of the company I used  to work.  They wo=
rked ok until 'some day' where the program memory  surprisingly got erase=
d.  Reprogramming solved the problem  'always'.
 =20
  Then I assume it was a problem with the FLASH of the Microcontroller or=
  with the Power Circuit (but it was a 12V Vicor power supply with a 7805=
  whit its capacitors). =20
 =20
 =20
 =20
  Regarding the topic, I never experienced this kind of problems with a P=
IC of any kind. =20


	=09
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