– All of Filter Input, Coefficient Input and Filter Output data are integers in a 2's complement expression.
– The Filter Input data should be entered one by one per clock.
– All of Coefficient Input data should be continuously entered during the filtering processing.
– The Reset is an asynchronous operation. All of Filter Input data in the circuit are initialized as 0 by the Reset.
– Filter Output data are not normalized.
A Filter Output Y is described as the following formula for the case of the number of taps = N,
Filter Input = X[0], X[1], ¡¦¡¦¡¦X[N1], and Coefficient Input = K[0], K[1], ¡¦¡¦¡¦, K[N1].
Y¡áX[N1]¡ßK[0]¡ÜX[N2]¡ßK[1]¡Ü¡¦¡¦¡¦¡ÜX[1]¡ßK[N2]¡ÜX[0]¡ßK[N1]
– Each output becomes valid 3 clocks after its input X[N] is entered. Detail is shown as below.
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Figure 2 Timing Chart
