Program-controlled unit and method for debugging said unit

(57) The method of debugging the program control unit which has a summary OCDS module, and the program control unit equipped with the OCDS module with an external debugger is indicated. The indicated program control unit is prepared by the access permission control apparatus (13), and with this equipment, The inside and/or external register which were demanded from the OCDS module, Read-out for the element which can answer, and writing access are characterized by performing, only when the equipment (2) which requires the access concerned proves the authority over this through a memory and/or an OCDS module. Even if this does not restrict the ability range of an OCDS module, the danger of abuse of this is reduced by the minimum.