A method of performing a programming, testing and trimming operation is disclosed in this invention. The method includes a step of applying a programming circuit for programming an OTP memory for probing and sensing one of three different states of the OTP memory for carrying out a trimming operation using one of the three states of the OTP memory whereby a higher utilization of OTP memory cells is achieved. Selecting and programming two conductive circuits of the OTP into two different operational characteristics thus enables the storing and sensing one of the three different states of the OTP memory. These two conductive circuits may include two different transistors for programming into a linear resistor and a nonlinear resistor with different current conducting characteristics. The programming processes include application of a high voltage and different programming currents thus generating different operational characteristics of these two transistors.