Acer Aspire 8951G Acer Aspire 8951G Notebook Service Guide - Page 52
Audio Codec and Amplifier, GPIOs General Purpose Input and Output for customized
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Audio Codec and Amplifier Item Audio Controller Features Specification Realtek ALC669X-GR 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 microphone 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. 1-42 Hardware Specifications and Configurations