Acer Aspire 4540 Acer Aspire 4540 Series Service Guide - Page 31

VGA Graphic Controller Item Type Manufacturing Tech. AMD M92XT 55 nm Form Factor Package 29mm*29mm M2 Specification Keyboard Item Keyboard Controller Total number of keypads Windows logo key Internal & external keyboard work simultaneously Specification ENE KB926 86-/87-/91-key keyboard Yes Yes Audio Interface Item Audio Controller Features Specification Realtek ALC888 Azalia Codec • HD Audio • 97dB SNR DACs & 90dB SNR ADCs • Ten DAC channels support 16/20/24-bit PCM format for 7.1 sound playback, plus 2channels of independent stereo sound output (multiple streaming) through the front panel output • Two stereo ADCs support 16/20/24-bit PCM format, one for stereo microphone, one for legacy mixer recording • All DACs supports 44.1k/48k/96k/192kHz sample rate • All ADCs support 44.1k/48k/96k sample rate • Two independent 16/20/24-bit S/PDIF-OUT converters support 44.1k/48k/ 96k/192kHzsample rate, one for nominal digital audio, the other one for digital audio output to HDMI transmitter • Enable VoIP function • Subwoofer support LAN Item Type Features Specification Atheros AR8131-AL1E for Giga LAN Bluetooth Item Type Supported Protocols Transfer Rate (max.) Specification Foxconn Bluetooth FOX_BRM_2.0 F/W 300 1.1, 1.2 & 2.0 + EDR (Extended Data Rate) 3.0Mbps Chapter 1 21