[TriEmbed] Recovering from bad flash

Michael Monaghan mike at chipworks.net
Sun May 29 13:56:52 CDT 2016


Ken,

The 9331 boot loader doesn't do SD over SPI for boot strap.  You have
however inspired low cost alternative.

- Lift _CS on the existing flash.
- Add socket jumping all signals except _CS
- Add switch for _CS lifting to vcc across 10K
- Switch to soldered flash
- Load U-Boot
- Copy flash to RAM
- Switch to socket flash
- Copy RAM to flash

Now the whole project is $6 for a pair of sockets.

Thanks for the inspiration!

Mike
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