SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
A coefficient value is 13 bits wide and takes a single half word. Thus, one VPI Control write carries one phase’s worth of coefficients. The last half-word in a quad-word is not used for 7tap coefficients.
Figure 11-90 VPI Control I/F Coef Data Format (7tap)The Vertical Polyphase scaler coefficients have only five or three values per phase, so the last three (or five) entries are unused. The Vertical Polyphase coefficient packing is shown in Figure 11-91 and Figure 11-92.
Figure 11-91 VPI Control I/F Coef Data Format (5tap)
Figure 11-92 VPI Control I/F Coef Data Format (3tap)