ES1946

 * 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  Spatializer3D VBX^TM stereo audio effects technology provided by Desper Products, Inc., a subsidiary of Spatializer Audio Laboratories, Inc.

THE ES1946 PCI AudioDrive^TMsolution 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 I² S 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^TM music synthesizer, 16-bit stereo wave ADC and DAC, 16-bit stereo music DAC, MPU-401 UART mode serial port, I² S 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^TM 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 Inte^®l, Pentium^®, Pentium II^®, and Celeron^TMchipsets 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.