PACKARD BELL LJ61 User Manual
Page 35
Chapter 1
25
Audio Interface
Power and Keyboard Controller
Item
Specification
Audio
Controller
Realtek ALC272 Azalia Codec and Amplifier G1454
•
Features
•
HD Audio
•
SNR > 85,High-performance DACs with 95dB SNR (A-Weighting), ADCs with
85dB SNR (A-Weighting)
•
Internal Digital Microphone
•
Two speakers, max. 1W output for each
•
Meets performance and function requirements for Microsoft WLP 3.10, and stricter
performance
•
requirements for future WLP
•
Two stereo DAC support 16/20/24-bit PCM for two independent playback (multiple
streaming)
•
Two stereo ADC supports 16/20/24-bit PCM format for two independent recording
•
All DACs support independent 44.1k/48k/96k/192kHz sample rate
•
All ADCs support independent 44.1k/48k/96k/192kHz sample rate
•
Two independent SPDIF outputs support 16/20/24-bit format and 44.1k/48k/88.2k/
96k/192kHz rate
•
All analog jack ports except MONO, BEEP-IN and HP-OUT are stereo input and
output re-tasking
•
Supports line level mono output
•
Supports analog PCBEEP input, and features an integrated digital BEEP
generator
•
Support two stereo digital microphone input for microphone array AEC/BF
application
•
Each stereo digital microphone interface has its own clock output to support
independent sample rate
•
Supports legacy analog mixer architecture
•
Built-in five headphone amplifiers on port-A and port-D, port-E, port-F and port-I.
•
Headphone amplifier on port-I (HP-OUT) is designed to drive output without
external DC blocking
•
capacitors
•
Software selectable 2.5V and 3.2V reference output for microphone bias
•
Software selectable boost gain (+10/+20/+30dB) for analog microphone input
•
Two jack detection pins; each supports detection of up to 4 jacks
•
Supports two GPIO (General Purpose Input/Output) pins (pin sharing with digital
microphone
•
interface)
•
Supports EAPD (External Amplifier Power Down) control for external amplifier
•
Supports anti-pop mode when analog power AVDD is on and digital power is off
•
Supports 1.5V~3.3V scalable I/O for HD Audio link
•
48-pin LQFP ‘Green’ package
Item
Specification
Controller
KB926
Total number of keypads
86/87/91
Windows logo key
Yes