Audio Codec And Amplifier - Acer ASPIRE 4253 Service Manual

Audio Codec and Amplifier

Item
Audio Controller
Features
Amplifier
1-38
Conexant 20584
24-bit, 2 pairs of independent DACs and 3 pairs of independent ADCs
ProCoustic headphone driver delivers 50 mW into 32 ohm load with no
pop, eliminating the need for an external amplifier and DC-blocking
capacitors
Integrated 5 V to 3.3 V low-dropout voltage regulator for improved audio
performance, eliminating need for external regulator or power transistor.
Integrated 3.3 V to 1.8 V low-dropout voltage regulator, used to power
digital blocks
Integrated 2 WRMS (per channel) class-D stereo speaker amplifier with
Spread Spectrum and 10-kV ESD withstand capability
Digital Microphone interface with internal MIC boost supporting 2 digital
microphone elements
Works with all digital microphones.
Internal microphone boost
Digital: 0, 12, 24, 36, 48 dB
Analog: 0, 10, 20, 30, 40 dB
Microphone Security Control
Please contact Conexant Sales/FAE for additional confidential document
to disable the bit in microphone from the BIOS.
Exceeds Windows Vista and Windows 7 Desktop and Notebook Premium
Logo
Requirements, WLP4.0
D-Flex power management exceeds Intel ECR 15B requirements, and
features Wake-On-PCBeep functionality
Hardware Headphone limiter bit (supports GS Mark EN50332-2)
Compliant with Intel High Definition Audio Specification Rev. 1.0
Supports both 1.5 V and 3.3 V signaling with the core logic chipset
Retaskable ports
Configure between Headphone and Line-out or between Mic and Line-in
Independent sampling rate for DAC and ADC; supports audio formats
ranging from 16-bit, 44.1 kHz to 24-bit, 192 kHz for DACs, and from 16-bit,
44.1 kHz to 24-bit, 96 kHz for ADCs.
Pop Shield: pops and clicks reduction circuitry, including class-D speaker
outputs
Jack sense detects up to 8 jacks using only two sense pins
Dual Sony Philips Digital Interface (S/PDIF) outputs
Digital Mixer
Simultaneous DAC and SPDIF engines
+3.3 V analog and I/O operation; uses Vaux for power management
modes
CX20584 embedded amplifier
Specification
Hardware Specifications and Configurations