Acer Aspire E1-421 Acer Aspire E1-421 Notebook Service Guide - Page 48

Audio Codec and Amplifier Item Audio Controller Features Amplifier Specification 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 1-38 Hardware Specifications and Configurations