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Re: J3 flash lockbits across reset


On Thu, 2006-01-12 at 09:44 +0100, Andrew Lunn wrote:
> On Thu, Jan 12, 2006 at 03:33:03AM -0500, alfred hitch wrote:
> > Hi,
> > 
> > I am confused on what is the correct behavior across power resets
> > (of hardware) for J3 flash'es.
> > 
> > 1) Will all sectors which were locked before power reset, remain so ?
> > 
> > I am confused by some posts on net, saying they get locked (all) by
> > default across resets (irr. of before power reset status)
> > 
> > Some say, it is unlocked (all blocks )by default  across resets.
> > 
> > I dont think flash should change status across resets. It should
> > preserve whatever I locked before reboot and vice versa.
> 
> The data sheet for the chip is the best source of answer for this
> question.
> 

The J3 devices are different from most other FLASH devices - all 
sectors are *always* locked after a device reset.  This is just how 
the hardware works.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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