ES1878 Datasheet | ESS Technology

ES1878 Audio Drive® Data Sheet GENERAL DESCRIPTION The ES1878 Audio Drive® is a mixed-signal single-chip solution that adds 16-bit stereo sound and FM music synthesis to notebook puters. The ES1878 includes an embedded microprocessor, a 20-voice ESFM™ music synthesizer, 16-bit stereo ADC and DACs, optional ISA Plug and Play (Pn P) support, hardware master volume control, DMA control logic with FIFO, ISA bus interface logic, general-purpose I/O, and digital dual game port. The ES1878 also incorporates three serial ports which allow interfacing with external DSP, wavetable, and MIDI (MPU401 UART Mode patible). In addition, the ES1878 offers I2S Zoom Video interface and support for the optional ES978 Expansion Audio Mixer in docking stations. A 4-wire expansion analog bus and 2-wire serial control bus connect the ES1878 with the ES978, allowing the ES1878 to engage the docking station’s audio resources when docked. The ES1878 Audio Drive® can record, press, and play back voice, sound, and music with built-in mixer controls. Using two high-performance DMA channels, the ES1878 supports 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 ES1878 is register patible with Yamaha’s OPL3™ FM synthesizer. The ES1878 Audio Drive® supports ISA Plug and Play with configuration for 4 logical devices: configuration device, audio plus ESFM™, game port, and MPU-401. The ES1878 also supports an optional non-Pn P (BIOS Plug and Play) configuration for the Intel® Mobile Triton chipset in which the PCA-ISA bridge Features Subtractive Decode and Positive Decode Modes. The MPU-401 serial port is for interfacing with an external MIDI device. The digital dual game port supports two joysticks with hardware timing which uses less CPU overhead and improves system performance. A DSP serial interface in the ES1878 allows an external DSP to take...