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