The SC function is not intended to process an input or
output signal. The purpose of the SC function is to
control another eTPU function's input parameter. The SC
function includes a controller algorithm. The controller
calculates its output based on two inputs: a measured
value and a desired value. The measured value, the actual
motor speed, is calculated based on inputs provided by
the quadrature decoder (QD) or Hall decoder (HD)
function. The desired value is an output of a speed ramp,whose
input is a SC function parameter, and can be provided by the CPU
or another eTPU function. In the motor-control eTPU function set,
this function mostly provides the speed closed loop. The controller
algorithm is a general proportional-integral-derivative (PID)
algorithm. It can be configured as PI or PID controller.
Functionality of SC in QD mode.
For full description refer to
AN2843.