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 Maestro™ 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 Maestro™ 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 Record and Playback Features • Full-duplex stereo operation for simultaneous record and • Meets or exceeds Audio CODEC ’97 Rev. 2.1 performance specifications • Supports dual-codec architecture for configuration with one ES1921 in notebook and one in docking station playback • 18-bit stereo ADC and DAC; 3rd 18-bit ADC for mic input • 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 • 48 kHz playback and record sample rate Power • Advanced Configuration and Power Interface (ACPI) mixer input and 1 mono input for phone • PC speaker input • 3.3 V or 5.0 V digital and 5.0 V analog power supply support using an external amplifier power down control (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 Mono Out Mixer L DAC SYNC True Line Out Line Out R BIT_CLK RESET# PC Beep DAC Analog Mixing and Volume Control AC-Link Interface and Register Set SDATA_OUT Phone Line CD L Video ADC SDATA_IN ADC ESS Technology, Inc. Aux R +20 dB Mux Mic1 Mic2 SAM0353-042100 1 ES1921 PRODUCT BRIEF AVDD1 VREF AVSS1 VREFOUT AFILT1 AFILT2 CAP1 CAP2 CAP3 ANTI_POP LINE_OUT_L LINE_OUT_R PINOUT 36 35 34 33 32 31 30 29 28 27 26 25 37 24 LINE_IN_R AVDD2 38 23 LINE_IN_L LNLVL_OUT_L 39 22 MIC2 NC 40 21 MIC1 LNLVL_OUT_R 41 20 CD_R AVSS2 42 CD_GND NC 43 ES1921 19 18 CD_L NC 44 48-PIN TQFP 17 VIDEO_R ID0 45 16 VIDEO_L ID1 46 15 AUX_R EAPD 47 14 AUX_L NC 48 13 PHONE (REV. C) RESET# PC_BEEP AVSS1 AVDD1 SYNC 10 11 12 VREF DVDD2 SDATA_IN 9 VREFOUT 8 AFILT1 DVSS2 BIT_CLK 7 AFILT2 6 SRC SDATA_OUT 5 CAP2 DVSS1 4 ENABLE XTL_OUT 3 PRIMARY_DN# DVDD1 LINE_OUT_R 2 XTL_IN 1 LINE_OUT_L MONO_OUT MIC1 LNLVL_OUT_R 41 20 CD_R AVSS2 42 CD_GND NC 43 ES1921 19 18 CD_L NC 44 17 VIDEO_R ID0 45 48-PIN TQFP (REV. D) 16 VIDEO_L ID1 46 15 AUX_R EAPD 47 14 AUX_L SDATA_IN1 48 13 PHONE 3 4 5 6 7 8 9 10 11 12 RESET# 2 PC_BEEP 1 SYNC 21 DVDD2 40 SDATA_IN MIC2 NC DVSS2 22 BIT_CLK 39 SDATA_OUT LINE_IN_L LNLVL_OUT_L DVSS1 23 XTL_OUT 38 DVDD1 LINE_IN_R AVDD2 XTL_IN 36 35 34 33 32 31 30 29 28 27 26 25 37 24 MONO_OUT Figure 1 ES1921 Revision C and Revision D Pinouts 2 SAM0353-042100 ESS Technology, Inc. ES1921 PRODUCT BRIEF REV. C BLOCK DIAGRAM DVSS DVDD AVDD CD LINE_IN AUX MIC1 MIC2 PHONE AVSS RECORD SOURCE VIDEO PLAYBACK MIXER PREAMP/MIC BOOST ID[1:0] PC_BEEP PCM-out DACs RESET# BIT_CLK SYNC SDATA_IN SDATA_OUT AFILT[1:0] Left 18-BIT DACDAC STEREO Right 18-BIT STEREO DACDAC MONO_OUT 18-BIT ADC Left FILTER FILTER 18-BIT ADC Right AC-LINK MONO VOL CTRL LNLVL PCM-in ADCs VREF VREFOUT MASTER VOL CTRL LINE_OUT REF GEN POWER MGMT MASTER VOL CTRL XTL_IN ESS Technology, Inc. XTL_OUT EAPD ANTI_POP SAM0353-042100 3 ES1921 PRODUCT BRIEF REV. D BLOCK DIAGRAM DVSS DVDD AVDD CD LINE_IN AUX MIC1 MIC2 PHONE AVSS RECORD SOURCE VIDEO PLAYBACK MIXER PREAMP/MIC BOOST ID[1:0] PC_BEEP PCM-out DACs RESET# BIT_CLK SYNC SDATA_IN SDATA_OUT AFILT[1:0] Left 18-BIT DACDAC STEREO Right 18-BIT STEREO DACDAC MONO_OUT 18-BIT ADC Left FILTER FILTER 18-BIT ADC Right AC-LINK MONO VOL CTRL LNLVL PCM-in ADCs VREF VREFOUT MASTER VOL CTRL 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. (P) U.S. Patent 4,214,125 and others, other patents pending. AudioDrive® is a registered trademark of ESS Technology, Inc. All other trademarks are owned by their respective holders and are used for identification purposes only. All specifications are subject to change without prior notice. ESS Technology, Inc. assumes no responsibility for any errors contained herein. 4 © 2000 ESS Technology, Inc. All rights reserved. SAM0353-042100