Re: [Flashforth-devel] UNO lockup

[Mikael N. <mik...@fl...>]

Ed, 

Setting the brown-out reset bits to %100 (4.3 volts) may prevent the
corruption. 

>From the datasheet: 

"A Flash program corruption can be caused by two situations when the
voltage is too low. First, a regular write sequence to the Flash
requires a minimum voltage to operate correctly. Secondly, the CPU
itself can execute instructions incorrectly, if the supply voltage for
executing instructions is too low." 

"Keep the AVR RESET active (low) during periods of insufficient power
supply voltage.
This can be done by enabling the internal Brown-out Detector (BOD) if
the operating volt-
age matches the detection level." 

BR Mikael 

On 2022-03-23 10:02, Ed wrote:

> I did some more testing involving more boards across several FF versions with no real conclusion.  Results attached. 
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Mikael