Control unit

Control unit (1), equipped with a microprocessor, with a programmable memory, a housing (2) and at least one data line (3.4) leaving the housing (2) and intended for connection with an external device to write and / or read data in the programmable memory, wherein the control unit (1) is embedded within the case (2) so that if the box (2) is opened, destroys, as partially at least, the operability of the control unit (1), further characterized in that the control unit (1) has a control device (5) which, when accessed via the data line ( 3.4) to write and / or read, so that the data is written to the programmable memory or read from it, check that the data are authorized and only allows the programmable memory write or read from it in case that the check has been positive.