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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
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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
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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
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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® is a registered trademark of ESS Technology, Inc. All other trademarks are owned by their respective holders and are used for identification purposes only.
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© 2000 ESS Technology, Inc. All rights reserved.
SAM0353-042100