Z8927320VSC

GENERAL
The Z89135/136 is a fully integrated, dual processor controller designed for low-cost digital telephone answering machines.
The I/O control processor is a Z8® MCU 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, 512 x 16 bits of RAM, single cycle instructions, and 6K word program ROM plus constants memory.
The chip also contains a half-flash 8-bit A/D converter with up to 128 kHz sample rate and 10-bit PWM D/A converter.
The sampling rates for the converters are programmable.
The precision of the 8-bit A/D may be extended by resampling the data at a lower rate in software.
FEATURES
• 24 KB of Z8 Program ROM (Z89135)
• Watch-Dog Timer and Power-On Reset
• Low Power STOP Mode
• On-Chip Oscillator which Accepts a Crystal or External Clock Drive
• Two 8-Bit Z8 Counter Timers with 6-Bit Prescaler
• Global Power-Down Mode
• Low Power Consumption - 200 mW (typical)
• Two Comparators with Programmable Interrupt Priority
• Six Vectored, Priority Z8 Interrupts
• RAM and ROM Protect
• Clock Speed of 20.48 MHz
• 16-Bit Digital Signal Processor (DSP)
• 6K Word DSP Program ROM
• 512 Words On-Chip DSP RAM
• 8-Bit A/D Converter with up to 128 kHz Sample Rate
• 10-Bit PWM D/A Converter (4 kHz to 64 kHz)
• Three Vectored, Prioritized DSP Interrupts
• Two DSP Timers to Support Different A/D and
• D/A Sampling Rates
• Z8 and DSP Operation in Parallel
• IBM® PC-Based Development Tools
• Developer’s Toolbox for T.A.M. Applications