Disclosed herein is a TDMA processing apparatus suitable for use in communication equipment for performing a communications service of a TDMA system. The TDMA processing apparatus can be reduced in size and manufactured at a low cost. The TDMA processing apparatus includes a one-chip microcomputer, which has a timer unit to which a preset value corresponding to each control-signal outputting timing as viewed from a reference point is set and for counting input reference clock pulses so as to make an interrupt request when the count reaches a preset value. In addition, the TDMA processing apparatus generates a control signal in response to the interrupt request.