Texas Instruments DEM-PCM2900 EVM, Руководство пользователя, Страница: 7 / 12

1-1
Description
The DEM-PCM2900 and DEM-PCM2902 are evaluation boards for the newly
developed Texas Instruments USB interface codecs, PCM2900 and
PCM2902. The DEM-PCM2900 includes a PCM2900. It is a bus-powered
USB codec without an S/PDIF interface. The DEM-PCM2902 includes a
PCM2902. It is a bus-powered USB codec with an S/PDIF interface.
A USB connector is mounted on DEM-PCM2900/2902. Connecting a USB
interface to this connector enables the evaluation of codec performance.
The DEM-PCM2900/2902 is operated by the 5-V bus power supply of the USB.
A 3.3-V IC regulator is mounted on the board to provide power or the codec and
analog circuitry.
Stereo audio output is available on a stereo minijack.
The PCM2900/2902 supports the following USB features:
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Fully compliant with the USB 1.1 specification
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Partially programmable descriptors
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USB adaptive mode for playback
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USB asynchronous mode for record
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Bus powered
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Full-speed transceivers
Topic Page
1.1 Block Diagram 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Connection Setting 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Switch Settings 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1