SPRUJB6B November 2024 – May 2025 AM2612
For Write transactions, for every 32Bytes of Data a 4/8/12/16 Byte MAC/TAG is generated and posted to the EMIF.
Only 32byte aligned Write transactions are allowed.
A RdMod transaction will be issued if one of the following conditions is true:
If any the above conditions are true, then a Modified Rd operation will get issued to make it compliant. Note this Rd data will get authenticated.
In order for the MAC authentication to be valid a compliant Wrt operation must occur before the compliant Rd op for that address location. If this does not occur then a MAC Error event will get issued.
The following conditions will create a False MAC Error:
Examples of False MAC Errors are: