<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def time_sp(self):
 """ Writing specifies the amount of time the motor will run when using the `run-timed` command. Reading returns the current value. Units are in milliseconds. """

        self._time_sp, value = self.get_attr_int(self._time_sp, 'time_sp')
        return value