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Question 3.6: Find the period of the machine cycle (MC) for various versio...

Find the period of the machine cycle (MC) for various versions of 8051, if XTAL=11.0592 MHz.
(a) AT89C51   (b) P89C54X2   (c) DS5000   (d) DS89C4x0

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(a)       11.0592MHz/12 = 921.6kHz;

MC is 1/921.6kHz = 1.085μs ＝ 1085ns

(b)       11.0592MHz/6 = 1.8432MHz;

MC is 1/1.8432MHz = 0.5425μs ＝ 542ns

(c)       11.0592MHz/4 = 2.7648MHz ;

MC is 1/2.7648MHz = 0.36μs ＝ 360ns

(d)       11.0592MHz/1 = 11.0592MHz;

 

MC is 1/11.0592MHz = 0.0904μs ＝ 90ns

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