Overview

The LC83015E is a digital signal processor IC designed for medium- and high-class home audio systems, such as AV amplifiers, mini, super-mini and car audio component systems.

特性 Features

? 80 ns cycle time at fs = 48kHz (256 cycles/fs)

? Dual-Harvard architecture allows single-cycle stereo signal integration and playback, with two of each of the following.

· 24 × 16-bit fixed decimal point multiplier.

· 32-bit arithmetic operation and 24-bit arithmetic logic operation ALU/shifter.

· 32-bit accumulator.

· 8 × 32-bit temporary storage registers.

· 64 × 24-bit internal data RAM.

· 128 × 16-bit internal coefficient RAM.

· 304 × 16-bit internal coefficient ROM.

? Large program memory.

· 1024 × 32-bit standard program ROM.

· 256 × 32-bit user program RAM.

? Standard program ROM.

· Sound-field simulation library.

Auditorium simulation.

Stereo, 3-band graphic equalizer.

12-band spectrum analyzer.

· Karaoke function library.

Pitch shift (realized in program RAM)

Vocal mute.

Microphone echo.

? Coefficient ROM.

· Logarithmic conversion coefficients.

? Audio interface.

· 2 input channels compatible with a variety of formats.

· 3 output channels compatible with a variety of 32/64fs formats.

? External memory interface.

· DRAM interface.

120 ns (maximum) RAS access time.

1Mbyte (256Kbyte × 4) or 256Kbyte (64Kbyte × 4).

1 or 2 units.

· SRAM/ROM interface.

100 ns (maximum) address access time.

1Mbyte (128Kbyte × 8) or 256Kbyte (32Kbyte × 8).

1 unit.

· Pseudo-SRAM interface.

70 ns (maximum) CE access time.

1Mbyte (128Kbyte × 8) or 256Kbyte (32Kbyte × 8).

1 unit.