Hot swapping Flash chips after booting.

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Topic: Hot swapping Flash chips after booting. (Read 3661 times)

carlossus

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Leon Curpa Stg1+

	Hot swapping Flash chips after booting. « on: November 04, 2011, 05:29:56 AM »

I’m making a simple flash chip selector circuit so I can toggle tunes using the number of pulses on the ignition switch.
I need to be able to boot from A then switch to B to be able to flash a blank or corrupted device and vice versa. Are there any implications in doing this say.. 10 seconds after boot time?

e.g.
Enable Flash A (with good image)… . . . . . . . . . . . . . .Boot… . . . . . . . . . . . . . .Wait 10s… . . . . . . . . . . . . . .Enable Flash B… . . . . . . . . . . . . . .Connect Nefmoto and re-flash over blank image.
Or can I reduce this time somewhat?
Thanks.


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kls

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	Re: Hot swapping Flash chips after booting. « Reply #1 on: November 06, 2011, 01:04:44 PM »

I used this technique via a toggle switch and the CE# line - worked fine all but one time. To really know if the flash gets accessed at other times you'd need to scope it.


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