David Wong <PICLIST@MITVMA.MIT.EDU> wrote:

> What is one Tcy and where is it referenced to in the book.

David:

Tcy is the instruction cycle time; it's equal to 4/Fos, where Fos is
the oscillator frequency (so if you're using a 4 MHz crystal, for
instance, Tcy = 1 microsecond).

The "Tcy" symbol is defined in the timing diagrams at the back of the
data books... Look at Section 18.5.

-Andy

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