Acer 8940 manual Audio Interface Specification

Audio Interface

Item	Specification
Chipset	REALTEK ALC889X for High Definition Audio Codec
Package	48-pin LQFP ‘green’ package
Features	• 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

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