accesses demanded from the ocds module 11 to the internal and or external registers 4 the memories 5 and or other components 6 which can be addressed via the ocds module 11 of the programmable unit 1 or of the system which contains the programmable unit 1 from being carried out the prevention of the protected read and write accesses can be carried out by the access authorization monitoring device 13 itself influencing the ocds module 11 which carries out the accesses and or by influencing the debug interface 12 and or the link between the ocds module 11 and the debug interface 12 the inhibit signal s which is set as standard is reset when the debugger 2 or a device connected to the programmable unit 1 instead of the debugger 2 verifies that the relevant device is authorized to request read and write accesses to the internal and or external registers 4 the memories 5 and or the other components 6 which can be addressed via the ocds module 11 this authorization can be verified for example by the transmission of predetermined data or a predetermined data string from the device requiring protected read or write accesses to the programmable device 1 if and for as long as the inhibit signal s is reset read and write accesses requested by the debugger 2 or by a device.