2.2.1 Write Operation Lost if Consecutive Writes to Specific Address Spaces
An ST/STD/STS instruction to address ≥ 64 followed by either an ST/STD instruction to address < 64 or a write to the SLPCTRL.CTRLA register will cause a loss of the last write.
Work Around
To avoid loss of write operation, use one of the following workarounds depending on address space:
Insert an NOP instruction before writing to address < 64, or use the OUT instruction instead of ST/STD
Insert an NOP instruction before writing to SLPCTRL.CTRLA register
Affected Silicon Revisions
A3
X
DS80001116C
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