WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 87

• 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

w
Production Data
ALTERNATIVE DAC INTERFACE
The WM8990 may be configured to select between two different audio interfaces, providing the
capability to receive DAC input data via BCLK2, DACLRC2 and DACDAT2 instead of BCLK,
DACLRC and DACDAT. This selection is made by register bit AIF_SEL, as described in Table 45.
To use the alternative DAC interface, the following register settings are required:
Note that additional devices can also be connected to the main interface pins using the TDM mode.
See "Digital Audio Interface" section for further details on controlling the audio interface pins.
The alternative DAC interface connection is illustrated in Figure 42.
Figure 42 Alternative DAC Interface
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AIF_SEL
AIF_TRIS = 0
AIF_SEL = 1
GPIO3_PU = 0, GPIO4_PU = 0, GPIO5_PU = 0
GPIO3_PD = 0, GPIO4_PD = 0, GPIO5_PD = 0
Processor #1
DIGITAL AUDIO
A-law and u-law support
INTERFACE
TDM Support
Alternative DAC Interface
Button Control / Accessory Detect
Clock Output
Processor #2
GPIO
PD, March 2009, Rev 4.0
WM8990
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