1-38 Hardware Specifications and ConfigurationsAudio Codec and AmplifierItem SpecificationAudio Controller Realtek ALC271X-VB6Features Hardware: Meets WLP (Windows Logo Program) requirements for Windows XP,Vista and Windows 7 4-channel DAC supports 16/20/24-bit PCM format for independenttwo stereo channel or 2.1 audio playback 4-channel ADC supports 16/20/24-bit PCM format for independenttwo stereo channel audio inputs All DACs supports 44.1k/48k/96k/192kHz sample rate All ADCs support 44.1k/48k/96k/192kHz sample rate S/PDIF-OUT support 16/20/24-bit format and 44.1/48/88.2/96/192kHzrate Supports MONO line level output, and Stereo digital microphoneinput Supports external PCBEEP input and built-in digital BEEP generator Built-in headphone amplifiers for port-C (LINE1) and port-I (HP OUT) Programmable +12/+24/+36db boost gain and volume control foranalog microphone input Headphone amplifier for port-I does not require DC blockingcapacitors Two jack detection pins each designed to detect up to 4 jacks, andS/PDIF-OUT jack detection is supported 2 GPIOs are supported for customized applications (pin shared withdigital microphone interface) EAPD (External Amplifier Power Down) is supported Supports Anti-pop mode when analog power AVDD is on and digitalpower is off. Support PC-Beep to internal speaker out (Port D) when no HDAcontrol, while AVDD and PVDD is supplied. Power support: 3.3V digital core power; 1.5V~3.3V digital IO powerfor HDA link; 3.0V~5.5V analog power; 4.5V~5.5V power stagevoltage Enhanced power management features for normal operation andstandby mode Stereo Bridge-Tied Load Class-D amplifier at port-D has 2Watt(rms)/4\ per channel output Short circuit and thermal overload protection for Class-D amplifier Class D amplifier has high pass filter with programmable Cut-Offfrequency (10Hz~900Hz) to prevent low frequency signal damagespeaker Class D amplifier output with slew rate and spread spectrum controlto improve EMI performance Independent left and right channel of output power limiter(25%~100% power range) to protect speaker Intel low power ECR compliant: supports power status control, jackdetection, and wake-up event in D3 mode Built in a 5V-to-4.5V linear regulator with 60dB PSRR to poweranalog circuitry 48-pin QFN ‘Green’ package
