Acer TravelMate 6493 Series Service Manual page 30

Audio Subsystem
Item
Chipset
Audio Onboard or Optional
Mono or Stereo
Resolution
Compatibility
Sampling Rate
Internal Microphone
Internal Speaker/Quantity
Features
20
Realtek ALC268VC
Onboard
Stereo
Two DACs channels support 16/20/24-bit PCM format playback
•
Two stereo ADCs support 16/20/24-bit PCM format recording
•
Support hardware digital volume control for digital microphone input
•
Software programmable boost gain (+20/+40dB) for analog
•
microphone input
Built-in headphone amplifiers for port-A and port-D.
•
Four GPIOs (General Purpose Input and Output) for customized
•
applications
Supports Anti-pop mode when analog power AVDD is on and digital
•
power is off
Integrates high pass filter to cancel DC offset generated from digital
•
microphone (ALC 268B)
All DACs supports 16/20/24-bit, 44.1k/48k/96k/192kHz sample rate
•
All ADCs supports 16/20/24-bit, 44.1k/48k/96k Hz sample rate
•
16/20/24-bit S/PDIF-OUT support 44.1k/48k/88.2k/96k/192kHz
•
sample rate
Support stereo digital microphone interface to improve voice quality
2
High-performance DACs with 95dB SNR (A-Weighting), ADCs with
•
90dB SNR (A-Weighting) Meets premium performance requirements
for Microsoft WLP 3.1
High-quality analog differential CD input
•
Supports external PCBEEP input, built-in digital BEEP generator, and
•
pass through function in D3 mode
Software selectable 2.5V/3.75V/4.2V VREFOUT
•
Two jack detection pins each designed to detect up to 4 jacks
•
1dB resolution of analog output volume control
•
48-pin LQFP 'Green' package
•
Support low voltage IO for HDA Link (1.5V~3.3V) (3.3 ~ 5 V) for
•
analog power
Specification
Chapter 1