ES1946 Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – PCI AudioDrive Notebook Solution Product Brief

ESS Technology, Inc.
ES1946
PCI AudioDrive^® Notebook Solution
Product Brief
DESCRIPTION
THE ES1946 PCI AudioDrive™ solution implements a single-chip
PCI audio solution, providing high-quality audio processing while
maintaining full legacy DOS game compatibility. With a dynamic
range over 80 dB, the ES1946 complies with the Microsoft® PC
98 / PC 99 specifications and meets WHQL audio requirements.
The ES1946 forms a complete audio subsystem on a single chip
for notebook platforms.
The ES1946 operates at 3.3V digital supply and 5V analog
supply. Combined with its built in power management support,
the ES1946 is an ideal audio solution for notebooks.
The ES1946 includes an I²S Zoom Video port interface that
allows playback of MPEG audio, using the 16-bit stereo music
DAC, thus reducing the total audio solution chip count.
The ES1946 incorporates a microcontroller, ESFM™ music
synthesizer, 16-bit stereo wave ADC and DAC, 16-bit stereo
music DAC, MPU-401 UART mode serial port, I²S Zoom Video
port, serial port interface to external wavetable music
synthesizer, dual game port, hardware master volume control,
direct memory access (DMA) control logic with FIFO, and PCI
bus interface logic. There are three stereo inputs (typically line-
in, CD audio, and auxiliary line) and a mono microphone input.
The ES1946 also incorporates Spatializer® VBX™ technology,
provided by Desper Products, Inc., a subsidiary of Spatializer
Audio Laboratories, Inc. This processor expands the stereo
sound field emitted by two speakers to create a resonant 3D
sound environment.
The ES1946 integrates the ESS Technology field-proven
hardware design for DOS game compatibility with hardware FM
synthesis (ESFM synthesis) and three methods for legacy audio
control interface: PC/PCI, distributed DMA, and transparent
DMA (TDMA). TDMA requires no sideband signals from PC core
logic chipsets in addition to the standard PCI 2.2 bus. TDMA is
compatible with the Intel® Pentium®, Pentium II®, and
Celeron™ chipsets as well as standard PCI add-in cards.
The ES1946 provides a serial EEPROM interface for ease of
programming the subsystem ID and subsystem vendor ID.
The ES1946 can record, compress, and play back voice, sound,
and music with built-in mixer controls. It supports stereo
full-duplex operation for simultaneous record and playback. The
ESFM synthesizer has extended capabilities within native mode
operation providing superior sound and power-down capabilities.
The ES1946 is compliant with Advanced Power Management
(APM) 1.2, Advanced Configuration and Power Interface (ACPI)
1.0, and PCI Power Management Interface (PPMI) 1.0.
It is available in an industry-standard 100-pin low profile quad flat
pack (LQFP) package.
FEATURES
• Single, high-performance, mixed-signal, 16-bit stereo VLSI chip
• 3.3V PCI parallel bus interface, revision 2.2.
• Full native DOS games compatibility, via three technologies:
—– TDMA
—– DDMA
—– PC/PCI
• High-quality ESFM music synthesizer
• Dynamic range (SNR) over 80 dB
• Serial EEPROM interface for SID and SVID resource
• Integrated Spatializer 3D VBX™ stereo audio effects
technology provided by Desper Products, Inc., a subsidiary of
Spatializer Audio Laboratories, Inc.
Record and Playback Features
• Record, compress, and play back voice, sound, and music
• 16-bit stereo ADC and DAC
• Programmable independent sample rates from 6 kHz up to
48 kHz for record and playback
• Full-duplex operation for simultaneous record and playback
• 2-wire hardware volume control for up, down, and mute
Inputs and Outputs
• Stereo inputs for line-in, auxiliary A (CD audio), and auxiliary B,
and a mono input for microphone
• I²S Zoom Video port interface for MPEG audio at up to 48 kHz
• MPU-401 (UART mode) interface for wavetable synthesizers
and MIDI devices
• Integrated dual game port
• Separate mono input and mono output for speakerphone
Mixer Features
• 7-channel mixer with stereo inputs for line, CD audio, auxiliary
line, music synthesizer, digital audio (wave files), and mono
inputs for microphone and speakerphone
• Programmable 6-bit logarithmic master volume control
Power
• Advanced power management meets APM 1.2, ACPI 1.0, and
PPMI 1.0 standards
• 3.3V digital supply operation
Compatibility
• Supports PC games and applications for SoundBlaster™ and
SoundBlaster Pro™
• Meets PC98 / PC99 and WHQL specifications
ESS Technology, Inc.
SAM0217-030601
1