Acer Aspire One AO531h Aspire One AO531h Service Guide - Page 28

Audio Codec and Amplifier Item Specification Audio Controller REALTEK ALC272 Features • Meets performance and function requirements defined in Microsoft WLP 3.0x and future WLP version • Two stereo DAC supports 16/20/24-bit PCM format for multiple streaming of playback • Two stereo ADC support 16/20/24-bit PCM format for multiple streaming of recording • All DAC support independent 44.1k/48k/96k/192kHz sample rate • All ADC support independent 44.1k/48k/96k/192kHz sample rate • Two independent S/PDIF output supports 16/20/24-bit format and 44.1k/48k/ 96k192kHz sample rate • All analog jack ports except MONO, BEEP-IN, MIC1 and HP-OUT are stereo input and output re-tasking • Supports line level mono output • Supports analog PCBEEP input, and a digital BEEP generator is integrated. • Up to four channels of digital microphone array input are supported for AEC/BF application • Supports legacy analog input to analog output mixer • Built-in five headphone amplifiers for port-A and port-D, port-E, port-F and port-I. • Headphone amplifier for port-I (HP-OUT) is designed to drive output without external DC blocking capacitors • Software selectable 2.5V and 3.2V reference output for microphone bias • Software selectable boost gain (+10/+20/+30dB) for analog microphone input • Two jack detection pins, each supports detection of up to 4 jacks • Jack detection function is supported when device is in power down mode (D3) • Supports two GPIO (general purpose input and output) pins (pin sharing with digital microphone interface) • Supports EAPD (external amplifier power down) control for external amplifier • Support 1.5V~3.3V scalable I/O for HD Audio link • Supports anti-pop mode when analog power AVDD is on and digital power is off • 48-pin LQFP 'Green' package LAN Interface Item Specification LAN Chipset Atheros AR8114 10/100 Mbps Fast Ethernet LAN with Integrated Transceiver Features • PCI-E interface LAN controller • PCIE V1.1 compliant • Supports wake on LAN • 48-pin QFN package Keyboard Item Specification Type New Acer flat keyboard Total number of keypads 84 Windows logo key Yes Internal & external keyboard work simultaneously Plug USB keyboard to the USB port directly: Yes 18 Chapter 1