UDA1335H 데이터 시트보기 (PDF) - Philips Electronics

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UDA1335H

Universal Serial Bus (USB) Audio Playback Recording Peripheral (APRP)

Philips Electronics 

Philips Semiconductors

Universal Serial Bus (USB) Audio

Playback Recording Peripheral (APRP)

Preliminary specification

UDA1335H

FEATURES

General

• USB stereo audio record and playback system with

20 bits analog-to-digital conversion (with 5 to 55 kHz

sample frequency range) and adaptive 20 bits

digital-to-analog conversion (with 5 to 55 kHz sample

frequency range) with integrated filtering

• USB-compliant audio/HID device

• Supports 12 Mbits/s ‘full speed’ serial data transmission

• Fully automatic ‘Plug-and-Play’ operation

• Supports multiple audio data formats (8, 16 and 24 bits)

• 5.0 and 3.3 V power supply

• Low power consumption

• Efficient power management

• On-chip master clock oscillators, only an external crystal

is required

• High linearity

• Wide dynamic range

• Superior signal-to-noise ratio

• Low total harmonic distortion

• Supports headphone and line output

• Partly programmable USB descriptors and configuration

via the I2C-bus.

Sound processing (for digital-to analog conversion)

• Separate digital volume control for left and right channel

• Soft mute

• Digital bass and treble tone control

• External Digital Sound Processor (DSP) option possible

via standard I2S-bus or Japanese digital I/O format

• Selectable clipping prevention

• Selectable Dynamic Bass Boost (DBB)

• On-chip digital de-emphasis.

Document references

• “USB Specification”

• “USB Device Class Definition for Audio Devices”

• “Device Class Definition for Human Interface Devices

(HID)”

• “USB HID Usage Table”

• “USB Common Class Specification”.

GENERAL DESCRIPTION

The UDA1335H is a stereo CMOS codec incorporating

bitstream converters designed for implementation in

USB-compliant audio peripherals and multimedia audio

applications. The UDA1335H is an adaptive asynchronous

sink USB audio device with a continuous sampling

frequency range from 5 to 55 kHz. It contains a USB

interface, an embedded microcontroller, an

Analog-to-Digital Interface (ADIF) and an Asynchronous

Digital-to-Analog Converter (ADAC).

The USB interface is the interface between the USB, the

ADIF, the ADAC and the microcontroller. The USB

interface consists of an analog front-end and a USB

processor. The analog front-end transforms the differential

USB data into a digital data stream. The USB processor

buffers the incoming and outgoing data from the analog

front-end and handles all low-level USB protocols.

The USB processor selects the relevant data from the

universal serial bus, performs an extensive error detection

and separates control information (input and output) and

audio information (input and output). The control

information is made accessible to the microcontroller.

The audio information received from the PC becomes

available at the digital I/O output or is fed directly to the

ADAC. The audio information to be transmitted to the PC

is delivered by the ADIF or by the digital I2S-bus interface.

The microcontroller handles the high-level USB protocols,

translates the incoming control requests and manages the

user interface via general purpose pins and an I2C-bus.

1998 Aug 28

2

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