1999 May 10 2
Philips Semiconductors Preliminary specification
Universal Serial Bus (USB) CODEC UDA1325FEATURES
General
•High Quality USB-compliant Audio/HID device
•Supports 12 Mbits/s serial data transmission
•Fully USB Plug and Play operation
•Supports ‘Bus-powered’ and ‘Self-powered’ operation
•3.3 V power supply
•Low power consumption with optional efficient power
control
•On-chip clock oscillator, only an external crystal is
required.
Audio playback channel
•One isochronous output endpoint
•Supports multiple audio data formats (8, 16and 24 bits)
•Adaptive sample frequency support from 5 to 55 kHz
•One master 20-bit I2S digital stereo playback output,
I2S andLSB justified serial formats
•One slave 20-bit I2S digital stereo playback input,
I2S andLSB justified serial formats
•Selectable volume control for left and right channel
•Soft mute control
•Digital bass and treble tone control
•Selectable on-chip digital de-emphasis
•Low total harmonic distortion (typical 90 dB)
•High signal-to-noise ratio (typical 95 dB)
•One stereo Line output.
Audio recording channel
•One isochronous input endpoint
•Supports multiple audio data formats (8, 16 and 24 bits)
•Twelve selectable sample rates (4, 8, 16 or 32 kHz;
5.5125, 11.025, 22.05 or 44.1 kHz; 6, 12, 24 or 48kHz)
via analog PLL (APLL).
•Selectable sample rate between 5 to55 kHz via a
second oscillator (optional)
•One slave 20-bit I2S digital stereo recording input,
I2S and LSB justified serial formats
•Programmable Gain Amplifier for left and right channel
•Low total harmonic distortion (typical 85 dB)
•High signal-to-noise ratio (typical 90 dB)
•One stereo Line/Microphone input.
USB endpoints
•2 control endpoints
•2 interrupt endpoints
•1 isochronous data sink endpoint
•1 isochronous data source endpoint.
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”
.