General Description
The eKA8561A is a USB digital audio controller with audio data processing that supports 16-bit 2-channel format at 48 kHz sampling rate. The device has an integrated USB transceiver, USB core, DAC, ADC, and I2S Input/Output. It can handle a high-level USB protocol, and manages user interface via HID I/O pins.

Features
USB Specification v1.1 Compliant
USB Audio and Human Interface Device (HID) Class v1.1 Compliant
Supports 12 Mbits/s Full Speed Serial Data Transmission
Supports 48K, 44.1kHz, 32kHz, 8kHz sampling rate
Single oscillator: 6MHz
Audio buffer size: 192×16 bits ×2
Total of four Endpoints: Endpoint 0 for control transfer , Endpoint 1 for audio streaming out , Endpoint 2 for streaming in , Endpoint 3 for HID
Supports stereo/mono playback
Built-in 2-channel D/A Converter with 10-bit resolution
Built-in 1-channel A/D converter with 10-bit resolution
Alternative settings supported by the audio streaming-out interface:
   ALT-0: (default setting) zero isochronous bandwidth
   ALT-1: 16-bit PCM 2 channel
Alternative settings supported by the audio streaming-in interface:
   ALT-0: (default setting) zero isochronous bandwidth
   ALT-1: 16-bit PCM stereo
2 LED direct sink pins with internal serial resistor
RC Oscillator with internal RC
Total of 3 HID control pins (Mute Speaker, Volume Down, Volume Up)
Wake-up pin in HID control pin
Package: 48-pin LQFP