WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 106

• Manufacturer Part Number: WM8990ECS/RV
• Description: Audio CODECs Stereo CODEC w.Class AB/D speaker driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8990ECS/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8990
w
Figure 65 TDM with Processor as Master
Note: The WM8990 is a 24-bit device. If the user operates the WM8990 in 32-bit mode then the 8
LSBs will be ignored on the receiving side and not driven on the transmitting side. It is therefore
recommended to add a pull-down resistor if necessary to the DACDAT line and the ADCDAT line in
TDM mode.
BCLK DIVIDE
The BCLK frequency is controlled by BCLK_DIV. When the ADCs and DACs are operating at
different sample rates, BCLK_DIV must be set appropriately to support the data rate of whichever is
the faster.
Internal clock divide and phase control mechanisms ensure that the BCLK, ADCLRC and DACLRC
edges will occur in a predictable and repeatable position relative to each other and to the data for a
given combination of DAC sample rate, ADC sample rate and BCLK_DIV settings.
See “Clocking and Sample Rates” section for more information.
PD, March 2009, Rev 4.0
Production Data
106