Rabbit 2000
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The Rabbit 2000 is a high-performance 8-bit microcontroller designed by Rabbit Semiconductor expressly to power embedded system application. Its extensive integrated feature set and glueless architecture facilitate rapid hardware design, and its C-friendly instruction set permits efficient development of complex applications for embedded systems. The instruction set is based on the old Z80 microcontroller, but with some additions of new instructions as well as deletions of the least used instructions. According to the Rabbit documentation, it executes its instructions 5 times faster than the original Z80 microprocessor.
Most of the Rabbit microcontrollers come with built-in flash memory and SRAM. They also have ADC and timer built in the system.