Acer Aspire 8940G Acer Aspire 8940 Service Guide - Page 37

Audio Interface Item Chipset Package Features Specification REALTEK ALC889X for High Definition Audio Codec 48-pin LQFP 'green' package • High performance DACs with 108dB signal-to-noise ratio • High performance ADCs with 104dB signal-to-noise ratio • Meets Microsoft WLP 3.0x and future WLP4.0 Premium requirements • Ten DAC channels support 16/20/24-bit PCM format for 7.1 sound playback, plus 2 channels of concurrent independent stereo sound output (multiple streaming) through the front panel output • Three stereo ADCs support 16/20/24-bit PCM format, multiple stereo recording • All DACs supports 44.1k/48k/88.2k/96k/176.4k/192kHz sample rate • All ADCs supports 44.1k/48k/88.2k/96k/176.4k/192kHz sample rate • Primary 16/20/24-bit S/PDIF-OUT supports 32k/44.1k/48k/88.2k/96k/ 192kHz sample rate • Secondary 16/20/24-bit S/PDIF-OUT supports 32k/44.1k/48k/88.2k/ 96k/192kHz sample rate • 16/20/24-bit S/PDIF-OUT supports 32k/44.1k/48k/88.2k/96k/192kHz sample rate • All analog jacks (port-A to port-G) are stereo input and output re-tasking • Port-A/B/C/D/E/F/ built-in headphone amplifiers • Port-B/C/E/F with software selectable boost gain (+10/+20/+30dB) for analog microphone input • High-quality analog differential CD input • Supports external PCBEEP input and built-in digital BEEP generator • Software selectable 2.5V/3.2V/4.0V VREFOUT • Up to four channels of microphone array input are supported for AEC/ BF application • Two jack detection pins each designed to detect up to 4 jacks plugging • Supports analog GPIO2 to be jack detection for CD input which is used as 9th analog port • Supports legacy analog mixer architecture • Up to 3 GPIOs for customized applications. GPIO0 and GPIO1 share pin with DMIC-CLK and DMIC-DATA • Supports mono and stereo digital microphone interface (pins shared with GPIO0 and GPIO1) • Supports anti-pop mode when analog power AVDD is on and digital power is off • Content Protection for Full Rate lossless Audio content playback (with selected versions of WinDVD/PowerDVD) • Stereo DSD (Direct Stream Digital) playback and recording converters are integrated • Zero-Detect output volume control • 1dB per step output volume and input volume control • Supports 3.3V digital core power, 1.5V or 3.3V digital I/O power for HD Audio link and 5.0V analog power Chapter 1 27