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WM8991 bảng dữ liệu(PDF) 86 Page - Wolfson Microelectronics plc

tên linh kiện WM8991
Giải thích chi tiết về linh kiện  Mobile Multimedia CODEC with Dual-Mode Class AB/D Speaker Driver
PDF  174 Pages
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nhà sản xuất  WOLFSON [Wolfson Microelectronics plc]
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WM8991 bảng dữ liệu(HTML) 86 Page - Wolfson Microelectronics plc

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WM8991
Pre-Production
w
PP, May 2008, Rev 3.1
86
ALTERNATIVE DAC INTERFACE
The WM8991 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:
•
AIF_TRIS = 0
•
AIF_SEL = 1
•
GPIO3_PU = 0, GPIO4_PU = 0, GPIO5_PU = 0
•
GPIO3_PD = 0, GPIO4_PD = 0, GPIO5_PD = 0
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.
DIGITAL AUDIO
INTERFACE
A-law and u-law support
TDM Support
GPIO
Alternative DAC Interface
Alternative MCLK
Button Control / Accessory Detect
Clock Output
Inverted ADCLRC
Processor #2
Processor #1
AIF_SEL
Figure 42 Alternative DAC Interface



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