The Z180 is available with clock speed of 33 MHz while the Rabbit has a maximum clock speed of 30 MHz. How can the Rabbit be three times faster?
A. The Z180 will run at 33 MHz, but at this speed a memory access time of at least 41 ns is required. This is faster than can be obtained with flash memory, so it would be necessary to copy the program from flash memory to a fast and expensive RAM in order to achieve this clock speed. The maximum clock speeds are shown below for the Z180 and Rabbit for various flash memory access speeds at standard baud rates.
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