SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The VPAC subsystem supports generating CRC signature on each output channel. The LSE module inside a HWA, implements a CRC signature capture mechanism, wherein it samples pixel (except H3A where it is fixed 32-bit) from each valid transfer from HWA core to LSE for each output channel. This CRC signature updates stop at end of frame and signature is available for reference comparison.
The VISS, NF and MSC modules are line based, hence in CRC signature calculation it is needed to scan frame in raster order (left to right and top to bottom). LDC being 2D block based processing needs different mechanism to compute signature. For LDC, pixels are scanned in raster order within block (left to right and from top to bottom), then blocks are scanned in raster order inside region and enabled regions are scanned in raster order within frame.