GENERAL DESCRIPTION

The Z87010/Z87L10 is a second generation CMOS Digital Signal Processor (DSP) that has been ROM-coded by Zilog to provide full-duplex 32 Kbps, Adaptive Delta Pulse Code Modulation (ADPCM) speech coding/decoding (CODEC), and interface to the Z87000/Z87L00 Spread Spectrum Cordless Telephone Controller. Together the Z87000/Z87L00 and Z87010/Z87L10 devices support the implementation of a 900 MHz frequency-hopping spread spectrum cordless telephone in conformance with United States FCC regulations for unlicensed operation.

FEATURES

Hardware

■ 16-Bit DSP Processor

■ 3.0V to 3.6V; -20° to +70°C, Z87L10

4.5V to 5.5V, -20° to +70°C, Z87010

■ Static Architecture

■ 512 Word On-Chip RAM

■ Modified Harvard Architecture

■ Direct Interface to Z87000 Frequency Hopping Spreader/Despreader

■ Direct Interface to 8-Bit µ-law Telephone CODEC

■ I/O Bus (16-Bit Tristable Data, 3-Bit Address)

■ Wait State Generator

■ Two External Interrupts

■ Four Separate I/O Pins (2 Input, 2 Output)

Software

■ Full Duplex 32 Kbps ADPCM Encoding/Decoding

■ Single Tone and DTMF Signal Generation

■ Sidetone, Volume Control, Mute Functions

■ Large Phone Number Memory (21 numbers of 23 digits each)

■ Master-Slave Protocol Interface to Z87000 Spreader/- Despreader