Acer Aspire 4250 Acer Aspire 4250 Notebook Service Manual - Page 47

Audio Codec and Amplifier Item Audio Controller Features Conexant 20584 Specification 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) AMD 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 Hardware Specifications and Configurations 1-37