SSS1623 Usound USB Headset Controller
Version 1.4
Confidential
Date : 2010.02.08
3
1. Product Overview
The SSS1623A3/A4 is a highly integrated single chip USB audio controller with GPIO and MCU bus for
function extension. SSS1623 features 16bits ADC, 16bits DAC, class AB earphone driver, microphone
booster, embedded regulator, and is compliant with USB audio class V1.0, which make SSS1623
especially suitable for USB headset application. SSS1623 also integrates I2S and MCU interface, which
provide more flexibility to connect to external codec or DSP for more function extension. Features can be
programmed through external EEPROM, and vendor can customize its own USB VID/PID and serial
number as well.
2. Features
Architecture
Highly integrated single chip USB audio controller with GPIO and MCU bus for function extension
External EEPROM interface for customized USB VID, PID, product string, and serial number
EEPROM write function via HID for mass production
GPIO and MCU interface access via HID
Compatible with Win 2000 / Win XP and Mac OS/Linux without additional driver
USB
Compliant with USB specification v2.0 full speed operation
Compliant with USB audio device class specification v1.0
Supports USB suspend/resume mode
Single 12MHz crystal input with on-chip PLL and embedded USB transceiver for USB connection
Supports one control endpoint, one isochronous out endpoint, one isochronous in endpoint, and one
interrupt in endpoint
Alternate zero bandwidth setting to release USB bandwidth when device is inactive
Peripherals
Two-wire serial bus to access external MCU with HID
Embedded 16 bits ADC for microphone input
Embedded I2S(master mode) & SPI interface for external 24 bit CODEC (ex:CS42L51)
Audio Features
UI for volume up, volume down, mute while playback, and mute while recording
Supports USB HID for volume up, volume down, and mute while playback
Supports 48KHz sampling rate for both playback and recording in headset application
Supports 8KHz, 11.025KHz, 22.05KHz, 32KHz, 44.1KHz, and 48KHz sampling rate in recording only
mode,
+20dB microphone boost (default enabled) is declared as AGC for default USB audio driver control
Embedded digital mixer (SSS1623A4 only)
Power
Embedded 5V to 3.3V and 3.3V to 1.8V regulators for single 5V operation
Embedded 16 bit DAC and 15 mW (32 ohm) class AB earphone driver
Embedded 1.8V POR
Package
48 LQFP, 64 LQFP, or dice
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