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LM25066: Questions of LM25066

Part Number: LM25066

Dear Team,

At present, when using LM25066, it is found that the SMBA signal is low, but the power supply works normally, the voltage is normal, and PG is high.
The specifications are as follows:

The D8h value I read is 0x0800, which I think is OK;
By writing the 03h register, then the SMBA signal is high.
1. What does ARA mean? what's the effect? I can't understand the description in the specification;
2. During normal use, how to avoid the situation that SMBA is low? How to prevent SMBA signal from being affected by ARA?

Read the values of several registers, which are somewhat abnormal as follows:
79h value is 0x7802, bit[14] is abnormal;
7ch value is 0x04, bit[2] is abnormal.
Will these registers affect the SMBA signal? Or will it affect the value of the D8h register?
At present, it is started with no load. If you need related lines or other information, please let me know.

Many Thanks,

Jimmy