WM8994ECSSLASHR datasheet(89/363 Pages) CIRRUS

89 / 363 page

WM8994

Rev 4.6

RETUNE MOBILE MODE

ReTune Mobile mode provides a comprehensive facility for the user to define the cut-off/centre

frequencies and filter bandwidth for each EQ band, in addition to the gain controls already described.

This enables the EQ to be accurately customised for a specific transducer characteristic or desired

sound profile.

The EQ enable and EQ gain controls are the same as defined for the default mode. The additional

coefficients used in ReTune Mobile mode are held in registers R1154 to R1171 for AIF1DAC1,

registers R1186 to R1203 for AIF1DAC2 and registers R1410 to R1427 for AIF2. These coefficients

are derived using tools provided in WISCE

™ evaluation board control software.

Please contact your local Cirrus Logic representative for more details.

Note that the WM8994 audio interfaces may operate at different sample rates concurrently. The EQ

settings for each interface must be programmed relative to the applicable sample rate of the

corresponding audio interface. If the audio interface sample rate is changed, then different EQ register

settings will be required to achieve a given EQ response.

WM8994ECS/R Datenblatt(PDF) 89 Page - Cirrus Logic