3.6.3.3 9 x 9 Symmetric FIR Filter

A 9 x 9 symmetric FIR filter can be implemented by using the 9 x 9 DOTP mode with the Math block 
pre-adder configured as two 9-bit pre-adders. The following figure shows an example of a 9 x 9 symmetric FIR filter for M number (divisible by 4) of taps.

Figure 3-11. 9 x 9 Symmetric FIR Filter