Acer TravelMate P243 SERIES, Service Manual

Page: 55 / 271

Hardware Specifications and Configurations 1-45
Audio Codec and Amplifier
Item Specification
Audio Controller Realtek ALC271X-VB6
Features 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)

Progra12/+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