The truth table given in the Libraries Guide for the CBxCLED modules is incorrect. When CLR = 1, the outputs TC and CEO are not necessarily 0, as reported in the truth table.
Solution
Solution:
By looking at the implementation of these macros, it is seen that the CLR line has no direct effect on either of the outputs TC or CEO.
The truth table given for these macros in the Libraries Guide is:
if CLR=1, then TC = 0 CEO = 0
However, this is incorrect. The outputs TC and CEO are driven by the equations, even if CLR = 1. These are: