Audio Codec And Amplifier - Acer Aspire E1-431 Service Manual

Audio Codec and Amplifier

Item
Audio Controller
Features
1-38
Realtek ALC271X-VB6
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 independent

two stereo channel or 2.1 audio playback
4-channel ADC supports 16/20/24-bit PCM format for independent

two 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 44.1/48/88.2/96/192kHz

rate
Supports MONO line level output, and Stereo digital microphone

input
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 for

analog microphone input
Headphone amplifier for port-I does not require DC blocking

capacitors
Two jack detection pins each designed to detect up to 4 jacks, and

S/PDIF-OUT jack detection is supported
2 GPIOs are supported for customized applications (pin shared with

digital microphone interface)
EAPD (External Amplifier Power Down) is supported

Supports Anti-pop mode when analog power AVDD is on and digital

power is off.
Support PC-Beep to internal speaker out (Port D) when no HDA

control, while AVDD and PVDD is supplied.
Power support: 3.3V digital core power; 1.5V~3.3V digital IO power

for HDA link; 3.0V~5.5V analog power; 4.5V~5.5V power stage
voltage
Enhanced power management features for normal operation and

standby 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-Off

frequency (10Hz~900Hz) to prevent low frequency signal damage
speaker
Class D amplifier output with slew rate and spread spectrum control

to 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, jack

detection, and wake-up event in D3 mode
Built in a 5V-to-4.5V linear regulator with 60dB PSRR to power

analog circuitry
48-pin QFN 'Green' package

Specification
Hardware Specifications and Configurations