ES1921S ESS, ES1921S Datasheet

ES1921S

Manufacturer Part Number

ES1921S

Description

AC-97 rev 2.1 audio codec

Manufacturer

ESS

Datasheet

1.ES1921S.pdf (4 pages)

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DESCRIPTION

The ES1921 audio codec is a combination codec and

audio mixer device that is fully compliant with Revision 2.1

Specification. When used with the ESS Technology

Maestro™ family of peripheral component interconnect

(PCI)-based digital audio accelerators, the ES1921 helps

complete

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. 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 downline

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 time division multiplexed (TDM)-

based serial AC-Link to transfer data between itself and a

digital audio accelerator, such as the ESS Technology

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 industry-

standard 48-pin low-profile quad flat pack (LQFP).

ESS Technology, Inc.

Intel’s

Audio

superior

Codec

high-performance

‘97

(AC‘97)

Component

PCI

audio

FEATURES

Record and Playback Features

Power

Compatibility

•

Meets or exceeds Audio Codec ‘97, Revision 2.1

performance specifications

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 microphones sharing a

single mixer input and 1 mono input for phone

PC speaker input

2 stereo outputs. Line out for multimedia speakers and

true line out for consumer audio applications

Usable in desktop, motherboard, and notebook sound

card applications, 3D audio applications, and in audio-

modem applications

Full-duplex stereo operation for simultaneous record and

playback

18-bit stereo ADC and DAC; 3rd 18-bit ADC for mic input.

48-kHz playback and record sample rate

Advanced Configuration and Power Interface (ACPI)

support using an external amplifier power-down control

3.3V digital and 5.0V analog power supply (AV

Meets Microsoft PC99/PC2001 and WHQL

specifications.

AC‘97 Rev 2.1 Audio Codec

)

SAM0353-022001

Product Brief

ES1921

Related parts for ES1921S

ES1921S Summary of contents

Page 1

... The ES1921 uses its six line-level inputs, its three outputs, and the time division multiplexed (TDM)- based serial AC-Link to transfer data between itself and a digital audio accelerator, such as the ESS Technology 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‘ ...

Page 2

... REF GEN POWER MGMT XTL_IN XTL_OUT Figure 1 ES1921 Block Diagram ES1921S 48-PIN LQFP NC 44 ID0 45 ID1 46 EAPD Figure 2 ES1921 48-Pin Pinout Diagram ...

Page 3

... REF V OUT 28 REF AFILT1 29 AFILT2 30 CAP1 31 CAP2 32 ESS Technology, Inc. I/O P Digital VDD. I Oscillator input (24.576 MHz). I Oscillator output. G Digital ground. I ‘ Serial data in. O Serial data clock (12.288 MHz). G Digital ground. O ‘ Serial data ou.t P Digital VDD ...

Page 4

... SS NC 43, 44, 48 ID0 45 ID1 46 EAPD 47 ORDERING INFORMATION Part Number Description ES1921S Audio Codec ESS Technology, Inc. 48401 Fremont Blvd. Fremont, CA 94538 Tel: (510) 492-1088 Fax: (510) 492-1898 4 © 2001 ESS Technology, Inc. I/O O Antipop power sustain delay. O Antipop output ground shunt control. ...

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