SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The MSC_LSE provides a data loopback channel.
When enabled (VPAC_MSC_LSE_CFG_LSE[0] LOOPBACK_EN), the LSE sends the “loopback-enabled” input channel unpacked data directly to the designated output channel packing logic without going through the HWA_CORE. The looped back data can be packed in a different format in the output channel to perform a data format conversion or can be packed in the same format as the input.
When the loopback mode is enabled, the “loopback” designated output channel is no longer available for HWA_CORE output data transfer. But, the input channel can still operate normally to read in the data for the HWA_CORE (provided that the other output channel is used for transferring out the HWA_CORE output data) by setting VPAC_MSC_LSE_CFG_LSE[1] LOOPBACK_CORE_EN. In this mode, the input channel flow is throttled by both the core and the loopback data path.
The data flow of the loopback mode is also controlled by the HTS synchronization signals.