ESS ESS1938 free download

File name ESS1938.pdf

ES1938 PCI AudioDrive® Solution Product Brief DESCRIPTION The ES1938 TM 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 ES1938 complies with the Microsoft® PC 98 / PC 99 specifications and meets WHQL audio requirements. The ES1938 forms a complete audio subsystem on a single chip for motherboard platforms. The ES1938 incorporates a microcontroller, ESFMTM music synthesizer, 16-bit stereo wave ADC and DAC, 16-bit stereo music DAC, MPU-401 UART mode serial port, dual game port, hardware master volume control, a serial port interface to external wavetable music synthesizer, 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. he ES1938 provides a serial EEPROM interface for ease of programming the Subsystem ID and Subsystem Vendor ID. The ES1938 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 ES1938 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 ES1938 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 ES1938 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. FEATURES · Single, high-performance, mixed-signal, 16-bit stereo VLSI chip · PCI parallel bus interface, revision 2.2 · Full native DOS games compatibility, via three technologies: ­ TDMA ­ DDMA ­ PC/PCI High-quality ESFMTM music synthesizer · · Dynamic range (SNR) over 80 dB · Integrated Spatializer® 3-D VBXTM stereo audio effects processor 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