The AST2500 includes an ECC-enabled SPI flash controller. However, the original documentation was ambiguous. The new revision provides explicit code examples for initializing ECC regions for the boot loader. Failure to follow the "new" sequence results in a 30% chance of boot failure after power cycling due to "Flash Uncorrectable Error" flags.
If you have an AST2500 on your bench and it isn't working, the "new" datasheet likely has the answer. aspeed ast2500 datasheet new
A warning to those searching for "aspeed ast2500 datasheet new": Many third-party "datasheet aggregate" sites host revision 1.01 from 2016 masquerading as new documents. The AST2500 includes an ECC-enabled SPI flash controller
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