SPRUJ53B April 2024 – September 2024 TMS320F28P550SJ , TMS320F28P559SJ-Q1
By default, all the valid events on a given interface enables a CRC unit for computation. However there are optional qualifiers that can be used to gate the CRC computation when valid events occur. If required, these qualifiers can be generated by masking the EBC units events. The AND/OR masks discussed in Section 13.2.2 are used to generate these qualifiers. Refer to the CRC_QUALIFIER register for a full list of available qualifiers. Figure 13-4 shows the connection between EBC event masking and exporting with the CRC qualifiers.
EBC units have the capability to monitor the Program Counter, data writes and data reads. CRC units can use the EBC units to decide when the check values can be calculated. For example, if required to calculate the check values only when the CPU is executing a specific function, the user can set up an EBC unit to monitor the PC and generate a CRC qualifier when that function is executed. This allows the CRC unit to calculated the check value only when desired.