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| ES1921 AC `97 Rev 2.1 Audio CODEC Data Sheet DESCRIPTION The ES1921 audio codec is a combination codec and audio mixer device that is fully compliant with Rev. 2.1 of Intel's Audio Codec' 97 (AC'97) Component Specification. When used with the ESS MaestroTM family of PCI-based digital audio accelerators, the ES1921 helps complete a superior high-performance PCI audio subsystem solution for both desktop and notebook computers. The ES1921 audio codec supports full-duplex stereo operation for simultaneous record and playback. Voice, sound, and music are regularly sampled for record and playback at 48 kHz. The playback mixer has four stereo inputs and two mono inputs. The record multiplexer has five stereo inputs and three mono inputs, while the mixer includes three outputs. Line Out can be used for stereo output to multimedia speakers while Mono Out can be used to output to a telephony subsystem or down-line phone. The major functions of the ES1921 include stereo 18-bit ADC and DAC audio signal conversion while also providing the interface and control logic to transfer audio data between its serial I/O terminals and the digital audio accelerator. The ES1921 uses its six line-level inputs, its three outputs and the TDM-based serial AC-Link to transfer data between itself and a digital audio accelerator, such as the ESS MaestroTM family of PCI-based digital audio accelerators. The ES1921 may be used as a primary or secondary CODEC in multiple codec configurations conforming to the AC'97 Rev. 2.1 specification. The ES1921's conformance to AC'97 in multiple codec configurations allows it to be used both in 2- and 4-speaker audio-only solutions and in audio-modem solutions for motherboards, add-on cards, or PCMCIA cards. The ES1921 is available in an industrystandard 48-pin Thin Quad Flat Pack (TQFP). FEATURES * Meets or exceeds Audio CODEC '97 Rev. 2.1 performance specifications Record and Playback Features * Full-duplex stereo operation for simultaneous record and playback * 18-bit stereo ADC and DAC; 3rd 18-bit ADC for mic input * Supports dual-codec architecture for configuration with one ES1921 in notebook and one in docking station * Supports AC-Link digital serial interface * 4 stereo inputs for line-in, CD, video, and auxiliary line-in * 2 selectable mono inputs for microphone sharing a single mixer input and 1 mono input for phone * PC speaker input * 48 kHz playback and record sample rate Power * Advanced Configuration and Power Interface (ACPI) support using an external amplifier power down control * 3.3 V or 5.0 V digital and 5.0 V analog power supply (AVDD >= DVDD) * 2 stereo outputs for line-out such as multimedia speakers and DVD Pure Audio * Usable in desktop, motherboard, notebook and sound card applications, 3D audio applications and in audiomodem applications Compatibility * Meets Microsoft PC99 specifications for Baseline and Advanced Audio with FAQ updates and with Rev. 2.1 of Intel's Audio CODEC '97 specification BLOCK DIAGRAM ES1921 L SYNC R BIT_CLK RESET# SDATA_OUT Mono Out DAC DAC AC-Link Interface and Register Set L Mixer True Line Out Line Out PC Beep Analog Mixing and Volume Control ADC Phone Line CD Video Aux +20 dB Mux SDATA_IN ADC R Mic1 Mic2 ESS Technology, Inc. SAM0353-042100 1 ES1921 PRODUCT BRIEF PINOUT LINE_OUT_R LINE_OUT_L ANTI_POP VREFOUT AFILT2 AFILT1 CAP3 CAP2 CAP1 MONO_OUT AVDD2 LNLVL_OUT_L NC LNLVL_OUT_R AVSS2 NC NC ID0 ID1 EAPD NC 36 35 34 33 32 31 30 29 28 27 26 25 37 24 38 39 40 41 42 43 44 45 46 47 48 1 2 3 4 5 6 7 8 9 23 22 21 20 AVSS1 VREF AVDD1 LINE_IN_R LINE_IN_L MIC2 MIC1 CD_R CD_GND CD_L VIDEO_R VIDEO_L AUX_R AUX_L PHONE ES1921 48-PIN TQFP 19 18 17 16 (REV. C) 15 14 13 10 11 12 SYNC RESET# AVSS1 DVSS1 DVDD1 DVSS2 DVDD2 SDATA_OUT PRIMARY_DN# LINE_OUT_R LINE_OUT_L SDATA_IN ENABLE AFILT2 AFILT1 VREFOUT CAP2 MONO_OUT AVDD2 LNLVL_OUT_L NC LNLVL_OUT_R AVSS2 NC NC ID0 ID1 EAPD SDATA_IN1 36 35 34 33 32 31 30 29 28 27 26 25 37 24 38 39 40 41 42 43 44 45 46 47 48 1 2 3 4 5 6 7 8 9 23 22 21 20 SRC VREF AVDD1 PC_BEEP XTL_IN XTL_OUT BIT_CLK LINE_IN_R LINE_IN_L MIC2 MIC1 CD_R CD_GND CD_L VIDEO_R VIDEO_L AUX_R AUX_L PHONE ES1921 48-PIN TQFP (REV. D) 19 18 17 16 15 14 13 10 11 12 XTL_OUT RESET# DVSS1 DVDD1 DVSS2 DVDD2 SYNC SDATA_OUT Figure 1 ES1921 Revision C and Revision D Pinouts 2 SAM0353-042100 SDATA_IN PC_BEEP XTL_IN BIT_CLK ESS Technology, Inc. ES1921 PRODUCT BRIEF REV. C BLOCK DIAGRAM DVSS DVDD CD LINE_IN VIDEO AUX MIC1 MIC2 PHONE PC_BEEP RECORD SOURCE PREAMP/MIC BOOST PLAYBACK MIXER AVDD AVSS ID[1:0] PCM-out DACs RESET# BIT_CLK SYNC SDATA_IN SDATA_OUT AFILT[1:0] AC-LINK FILTER Left 18-BIT DAC STEREO DAC 18-BIT STEREO DAC DAC FILTER 18-BIT ADC 18-BIT ADC Left MONO VOL CTRL MONO_OUT Right Right LNLVL MASTER VOL CTRL PCM-in ADCs VREF VREFOUT LINE_OUT REF GEN POWER MGMT MASTER VOL CTRL XTL_IN XTL_OUT EAPD ANTI_POP ESS Technology, Inc. SAM0353-042100 3 ES1921 PRODUCT BRIEF REV. D BLOCK DIAGRAM DVSS DVDD CD LINE_IN VIDEO AUX MIC1 MIC2 PHONE PC_BEEP RECORD SOURCE PREAMP/MIC BOOST PLAYBACK MIXER AVDD AVSS ID[1:0] PCM-out DACs RESET# BIT_CLK SYNC SDATA_IN SDATA_OUT AFILT[1:0] AC-LINK FILTER Left 18-BIT DAC STEREO DAC 18-BIT STEREO DAC DAC FILTER 18-BIT ADC 18-BIT ADC Left MONO VOL CTRL MONO_OUT Right Right LNLVL MASTER VOL CTRL PCM-in ADCs VREF VREFOUT LINE_OUT REF GEN POWER MGMT MASTER VOL CTRL XTL_IN XTL_OUT EAPD ANTI_POP No part of this publication may be reproduced, stored in a retrieval system, transmitted, or translated in any form or by any means, electronic, mechanical, manual, optical, or otherwise, without the prior written permission of ESS Technology, Inc. ESS Technology, Inc. makes no representations or warranties regarding the content of this document. All specifications are subject to change without prior notice. ESS Technology, Inc. assumes no responsibility for any errors contained herein. (P) U.S. Patent 4,214,125 and others, other patents pending. AudioDrive(R) is a registered trademark of ESS Technology, Inc. All other trademarks are owned by their respective holders and are used for identification purposes only. 4 (c) 2000 ESS Technology, Inc. All rights reserved. SAM0353-042100 |
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