There are two types of how to start the PSC: one using the CPU core and the other one using a peripheral function. The way to start the PSC using a peripheral function differs according to products. For an example, if the PSC needs to be periodically started, the interval timer interrupt should be used. The AD conversion termination interrupt can be also used. Once the PSC is activated, it runs program stored in the code RAM and then stores a calculation result or processing result in the data RAM. Then, it runs a STOP instruction. These processes generate a PSC termination interrupt in the CPU core and stop the operation. The stopping PSC does not consume power and stand by for the next starting factor.