OT8000 Dual USB Digital Audio Bridging Controller

OT8000 is a highly-integrated USB digital audio bridging controller with flexible features for Apple/Android digital audio docking systems. It has 2 channel DAC/ADC outputs with headphone amplifier that supports 16-bit resolution and 96KHz, 48 KHz, 44.1 KHz, 32 KHz, 22.05 KHz, 16 KHz, 11.025 KHz, 8 KHz sampling rates. In addition, it also supports digital audio input and output via I2S interface.

The OT8000 contains many GPIOs, rich bus/interfaces, RTC, SAR ADC, UART, I2C, SPI. Only a 32.768 KHz crystal is needed in the system and the PLLs of OT8000 can generate clocks for various applications.

OT8000 is available for 80 pins LQFP (10x10mm) and 128 pins LQFP (14x14mm) package.

Features

Communication Interfaces
● Two USB 2.0 Full-speed Dual-Roles controller(OTG)
● Two Full-duplex UART ports
● Configurable IrDA receiver
● Four-wire SPI module in Master or Slave mode
● Two I2C modules in Master or Slave mode

Input/ Output/Analog feature
● 24mA source/sink I/O pins(Four pins a group)
● Selectable open drain, pull-ups, and pull-downs
● External interrupts and Wake-up I/O pins
● Pulse-Width Modulation (PWM) operates in capture or generate mode with 16-bit time bases
● 10bits resolution SAR ADC

Audio Codec
● DAC Line Output
-THDN:-80dB
-Dynamic Range, SNR: 96dB
● Single-ended ADC
-THDN:-80dB
-Dynamic Range, SNR: 90dB
● Headphone Driver Output:
-THDN:-60dB @ 32Ohm 10mW
- Dynamic Range, SNR: 93dB
● Two Line-In inputs with volume adjustment
● Microphone Input
● Two I2S input in Master and Slave mode
● I2S output in Master and Slave mode
● Volume adjustable on I2S output
● Stereo headphone output
● Analog to Digital conversion

Timer System
● Independent RTC module with time and calendar
● Three 16bit Timers/Counters

Clock Management
● Configurable PLLs
● Independent Watchdog timer
● 32.768 Crystal Source

Power Management
● 3.3V power supply
● Suspend Current : TBD
● Suspend Current with RTC alive : TBD
● MCU off and RTC alive : TBD

Protocol and Driver
● USB Audio Device Class v1.0
● USB Human Interface Device Class(HID)
● iPod Accessory Protocol (iAP1/iAP2)
● Android Open Accessory protocol(AOA 1.0/2.0)

Applications
● Apple Digital Docking System
● Android Digital Docking System
● USB Audio Speaker

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