FAQ MIC5332 RTC Sync Limitations

Pre-requirement & reference:

To avoid system time differences, a synchronization mechanism among all sources that are available in an ATCA environment is needed. Please refer to FAQ for detail in ATCA RTC sync mechanism.

Purpose:

MIC-5332 is Advantech ATCA blade, it has RTC synchronization to make sure blade boot up with time synced. This FAQ introduces a possible limitation of our IPMC on MIC-5332, this result in sync up system time from IPMC chip is NOT reliable as we expected.

Because of Errata sheet LPC1768 (Our IPMC Chip) , its RTC is not reliable.  Means settings on IPMC based is not reliable either.  

Means RTC time sync set to 0x02 is NOT allowed or system time cannot be guarantee.

Target Audience:

All users who are using Advantech ATCA MIC-5332

Use Cases:

Just avoid using 0x02 set described in ATCA RTC sync mechanism. There's no impact when blade in chassis with ShMC inside.