WM8959 Wolfson Microelectronics Ltd., WM8959 Datasheet - Page 76
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WM8959
Manufacturer Part Number
WM8959
Description
Mobile Multimedia DAC with Dual-mode Class AB/D Speaker Driver
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet
1.WM8959.pdf
(155 pages)
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WM8959
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ALTERNATIVE DAC INTERFACE
The WM8959 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 37.
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 41.
Figure 41 Alternative DAC Interface
•
•
•
•
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
PP, May 2008, Rev 3.1
Pre-Production
76
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