GENERAL DESCRIPTION

The Z89175/176 is a fully integrated, dual processor controller designed for voice processing applications. The I/O control processor is a Z8® with 24 KB of program memory, two 8-bit counter/timers, and up to 47 I/O pins. The DSP is a 16-bit processor with a 24-bit ALU and accumulator, 512x16 bits of RAM, single cycle instructions, and 8K words of program ROM. The chip also contains a half-flash 8-bit A/D converter with up to a 16 kHz sample rate and a 10-bit PWM D/A converter.

FEATURES

■ Watch-Dog Timer and Power-On Reset

■ Improved Low Power Stop Mode

■ On-Chip Oscillator which Accepts a Crystal

or External Clock Drive

■ Improved Global Power-Down Mode

■ Low Power Consumption - 200 mW (typical)

■ Two Comparators

■ RAM and ROM Protect

■ On-Board Oscillator for 32.768 kHz Real-Time Clock

■ Clock Speeds of 20.48 or 29.49 MHz

■ 16-Bit Digital Signal Processor (DSP)

■ 8K Word DSP Program ROM

■ 512 Words On-Chip DSP RAM

■ 8-Bit A/D Converter with up to 16 kHz Sample Rate

■ 10-Bit PWM D/A Converter

■ Six Vectored, Prioritized Z8 Interrupts

■ Three Vectored, Prioritized DSP Interrupts

■ Two DSP Timers to Support Different A/D and D/A

Sampling Rates

■ IBM® PC-Based Development Tools

■ Developer’s Toolbox for T.A.M. Applications