Acer Aspire ONE 722, Service Manual, Page: 43 / 222

Hardware Specifications and Configurations
1-33
Audio Codec and Amplifier
Item Specification
Audio Controller Conexant, CX20584-21Z QFN
Features

24-bit, 2 pairs of independent DACs and 3 pairs of
independent ADCs

ProCoustic headphone driver delivers 50 mW into 32

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