Acer Aspire 8942G Series Service Manual page 37

Audio Interface
Item
Chipset
Package
Features
Chapter 1
ALC669X-GR for High Definition Audio Codec
48-pin LQFP package
• Meets Microsoft WLP (Windows Logo Program) audio requirements
• High performance DACs with digital >110dB and analog 98dB (A -
weighting) signal-to-noise
• High performance ADCs with digital > 100dB and analog 90dB (A -
Weighting) signal-to-noise ratio
• Six DAC channels support 16/20/24 -bit PCM format for 5.1 sound
playback
• Two stereo ADCs support 16/20/24 -bit PCM format, multiple stereo
recording
• All DACs supports 44.1k/48k/96k/192kHz sample rate
• All ADCs supports 44.1k/48k/96k/192kHz sample rate
• Primary 16/20/24-bit SPDIF-OUT supports 32k/44.1k/48k/88.2k/96k/
192kHz sample rate
• Secondary 16/20/24-bit SPDIF-OUT supports 32k/44.1k/48k/88.2k/96k/
192kHz sample rate
• Analog jacks (port-A, B, C, E and G) support stereo input and output re
-tasking
• Support MONO output at port -H
• Port-A/D/E/F built in headphone amplifiers
• Port-E and Port-F headphone amplifiers can drive earphone directly
without DC blocking capacitor
• Port-B/C/E/F with software selectable boost gain (+10/+20/+30dB) for
analog micr ophone input
• Supports external PCBEEP input and built -in digital BEEP generator
• Software selectable 2.5V/3.2V VREFOUT
• Supports legacy analog mixer architecture
• Four channels of digital microphone array input for voice applications
• Two jack detection pins each designed to detect up to 4 jacks plugging
• 1.0dB/step playback volume control
• 1.5dB/step recording volume control
• High pass filter to cancel DC offset from AD converter
• Jack detection function is supported when device is in power down
mode (D3)
• 2 GPIOs (General Purpose Input and Output) for customized
applications. GPIO0 and GPIO1 share
• pin with digital microphone
• Supports anti-pop mode when analog power AVDD is on and digital
power is off.
• Audio Content Protection for Blu -Ray DVD playback (with selected
player provided by InterVideo,
• CyberLink and ArcSoft)
• Intel low power ECR compliant and power status control for every
analog converter and pin widgets
• Supports 3.3V digital core power, 1.5V~ 3.3V scalable digital I/O power
for HD Audio link, and
• 3.0~5.0V analog power
Specification
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