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Software Overview
27
SBAU341B – January 2020 – Revised June 2020
Copyright © 2020, Texas Instruments Incorporated
PCM6xx0Q1EVM-PDK Evaluation Module
4.1.5
Programmable BiQuads
Configuration of the biquad filters is made easy with the GUI in the programmable biquads tab. Biquad
coefficients can be generated using the filter designers within PPC3, or coefficients from an external filter
design tool can be manually entered. Each biquad can be configured individually and then the gain and
phase responses can be shown for individual channels or for all channels.
NOTE:
PPC3 uses the detected sampling rate from the audio serial bus tab to determine the biquad
coefficients. The PCM6xx0Q1 device must be receiving the desired sampling rate when the
audio serial bus tab is opened, and the clock monitor must be updated by clicking on the
Read
button. If no EVM is connected, PPC3 assumes an f
S
of 48 kHz for all biquad
calculations.
For more information on the filter design tools included in the programmable biquads tab (
), and
other methods for generating filter coefficients, see the
PCM6xx0 Programmable Biquad Filter
Configuration and Applications
Figure 33. Programmable Biquads Tab