GENERAL DESCRIPTION

The Z87001 /Z87L01 FHSS Cordless Telephone Transceiver/Controller is expressly designed to implement a 900 MHz frequency hopping spread spectrum cordless telephone compliant with US FCC regulations for unlicensed operation. The Z87001 and Z87L01 are distinct 5V and 3.3V versions, respectively, of the core device. For the sake of brevity, all subsequent references to the Z87001 in this document also apply to the Z87L01 unless specifically noted.

FEATURES

■ Transceiver/Controller Chip Optimized for Implementation of 900 MHz Spread Spectrum Cordless Telephone

– Adaptive Frequency Hopping

– Transmit Power Control

– Error Control Signaling

– Handset Power Management

– Support of 32 kbps ADPCM Speech Coding for High Voice Quality

■ DSP Core Acts as Phone Controller

– Zilog-Provided Embedded Transceiver Software to Control Transceiver Operation and Base StationHandset Communications Protocol

– User-Modifiable Software Governs Telephone Features

■ Transceiver Circuitry Provides Primary Cordless Phone Communications Functions

– Digital Downconversion with Automatic Frequency Control (AFC) Loop

– FSK Demodulator

– FSK Modulator

– Symbol Synchronizer

– Time Division Duplex (TDD) Transmit and Receive Buffers

■ On-Chip A/D and D/A to Support 10.7 MHz IF Interface

■ Up to 64 Kw of External Program Memory Accessible by the DSP Core

■ Bus Interface to Z87010 ADPCM Processor

■ Static CMOS for Low Power Consumption

■ 3.0V to 3.6V, -20°C to +70°C, Z87L01

4.5V to 5.5V, -20°C to +70°C, Z87001

■ 16.384 MHz Base Clock