ESS ESS1946 free download

File name ESS1946.pdf

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. ® FEATURES · Single, high-performance, mixed-signal, 16-bit stereo VLSI chip · 3.3 volt PCI parallel bus interface, revision 2.2. · Full native DOS games compatibility, via three technologies: ­ TDMA ­ DDMA ­ PC/PCI High-Quality ESFMTM music synthesizer The ES1946 operates at 3.3 volt digital supply and 5 volt 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 which 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, ESFMTM 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, 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® VBXTM 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 3-D sound environment. The ES1946 integrates ESS' field-proven hardware design for DOS game compatibility with hardware FM synthesis (ESFMTM synthesis) and three methods for legacy audio control interface: PC/PCI, Distributed DMA, and Transparent DMA. Transparent DMA 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 CeleronTM 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 ESFMTM 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 Thin Quad Flat Pack (TQFP) package. · · Dynamic range (SNR) over 80 dB · Serial EEPROM interface for SID