Patent ID: 7760847

Claim:
A counting circuit, comprising: a first counter having an initial value based on first to fourth input data input through a set terminal and configured to output first and second counting signals based on a clock signal, and to output a first control signal; a first clock unit for outputting a first control clock signal based on the first control signal and the clock signal; a second counter having an initial value based on fifth to eighth input data and configured to output third and fourth counting signals according to the first control clock signal, and to output a second control signal; a second clock unit for outputting a second control clock signal based on the second control signal and the first control clock signal; a third counter having an initial value based on ninth to twelfth input data and configured to output fifth and sixth counting signals based on the second control clock signal, and to output a third control signal; a third clock unit for outputting a third control clock signal based on the third control signal and the second control clock signal; and a fourth counter having an initial value based on thirteenth to sixteenth input data and configured to output seventh and eighth counting signals based on the third control clock signal.