SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The HTS interface is used to synchronize between blocks in VPAC Subsystem. In the case of LDC, it controls the start of LDC operation by issuing hts_init. LDC will be waiting for hts_init once it is enabled, so LDC is expected to be enabled before issuing hts_init.
HTS also controls the LDC output write which will indirectly control all LDC operations (that is, fetch and processing). LDC will start writing output pixel data when only it receives hts_tstart for that particular block. Once all output data is written, LDC will generate hts_tdone (also hts_eop if it is last block of the frame).