Z89340

` 64 High-Speed Audio Processing Units (APUs) or 128 Half-Speed APUs
` 3-D Sound Capability
` Downloadable Sample Capability
` 8-Channel, 20-Bit Linear PCM Audio Generator
` Output Sampling Rates up to 50 kHz
` Supports 16-, 18-, and 20-Bit Serial DACS Greater than 96 Db Dynamic Range n Supports 16- and 8-Bit Linear PCM Sampling, ADPCM, and Wavetable Synthesis, Variable Playback Rates for ADPCM
` Internal 24-Bit Audio Accumulators
` Addresses 16M x 16 Sample ROM Directly (No Paging Necessary)
` Jumperless Configurable ISA Bus Interface
` Sound Blaster and OPL3 Register Compatibility, MPU401 UART Mode Compatible
` Built-In 64-Channel Bus-Mastering DMA Controller
` FM Emulation

The Z89340 is a high-performance, programmable wavetable engine designed for musical instruments, general MIDI (Musical Instrument Digital Interface) sound modules, digital mixing consoles with high-quality PC sound cards, and computer-controlled multimedia applications.

This device features a 24-bit address bus for addressing16-bit sample-storage ROM and DRAM (DRAM refresh controller on-board), a 12x16 two's-complement scaler, eight 24-bit accumulators with clipping circuitry, a 2x8x16 interpolator to allow a high resolution of phase angles between input samples, CD-quality sampling rates, and 64 high-speed audio processing units (APUs) that can be split into two low-speed APUs that operate at half the sampling rate, allowing up to 128 notes to play simultaneously. All APUs are independent and can address any part of data storage at any time.

The Z89340 can operate at output sampling rates up to 50 kHz, and offers eight channels of 16- to 20-bit serial output data. The microprocessor interface allows full control of frequency, amplitude, and sample data input to each oscillator. The Z89340 features eight output registers, and their contents can be sent to DAC or CODEC. Four of these can e used for quadraphonic output, and have a panning mechanism called Polar Pan that supports motion in all four quadrants.

The other four output registers are used internally as effects channels, but can still send their data streams to a DAC, a second Z89340, or other digital signal processor. The Z89340 also has eight serial input data registers. In addition, there are 24 stereo submix register pairs for use in sending output data from one APU to be used as the input to another.

In particular, the Z89340 is well-suited for 8- and 16-bit linear PCM recording/playback, wave synthesis, Sound Blaster command set, and ADPCM (IMA/DVI) real-time decompression.