w681308 Winbond Electronics Corp America, w681308 Datasheet - Page 43

• Manufacturer Part Number: w681308
• Description: Usb Audio Controller
• Manufacturer: Winbond Electronics Corp America

1
1
T
T
a
1
Transmit Path Operation
The microphone is biased through pins MCP by an internal programmable voltage reference and programmable resistor. The
microphone ac signal is gained up by the input amplifier and filtered to prevent aliasing at the input of the sigma delta ADC.
The sigma delta ADC converts the signal in a 2 bit digital representation, which is decimated and low pass filtered to the
base band sampling rate of 8kHz to 48kHz. A high pass filter can be enabled in the transmit path.
3.
3.1
udio data.
3.2
he audio CODEC interface allows the USB Audio Controller Device to be connected to one or more of the following:
he audio data is flowing between USB interface and CODEC through 2 segmented FIFOs that allow MCU processing of
16 bit internal linear PCM CODEC and Echo Cancellation block.
8/16/48 KHz CODEC sampling rate
An I2S interface to and from the on chip linear CODEC.
A PCM interface to connect to a external Nuvoton ProX SLIC/CODEC
Audio Codec Interface
Overview
Audio CODEC Signal Path
Figure 8 W681308 CODEC Signal Path Control
XXXX PRODUCT DESCRIPTION
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W681308
Rev1.2