SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Figure 9-100 shows the averager behavior for border conditions. If the input image is not big enough, border duplication must occur.
Downscaling is enabled from the RZi_DWN_EN register. Moreover, the vertical averaging size is set by the RZA_DWN_AV[5:3] V bit field. The actual downscale ratio is given by 1/2(RZA_DWN_AV[5:3] V +1). The range is from 1/2 to 1/256 in power of 2. The horizontal averaging size is set by the RZA_DWN_AV[0:2] H bit field. The actual downscale ratio is given by 1/2(RZA_DWN_AV[5:3] H +1). The equations are the same for RSZ-B. The range goes from 1/2 to 1/256 in power of 2.