Method of Up-Dating the Contents of the Electronic Memory of an Electronic Appliance

1. A method of updating the contents of an electronic memory device, the electronic memory device being designed as an erasable programmable read-only memory module and containing a stored program code, the method comprising the steps of: transmitting a program code to the erasable programmable read-only memory module from a data processing system, wherein the data processing system is connected to the electronic memory device by a serial interface and wherein the program code is stored in a memory device of the data processing system; loading the transmitted program code into a random-access memory assigned to the erasable programmable read-only memory module; activating the program code loaded into the random-access memory, and initiating communication between the random-access memory and the data processing system; erasing the erasable programmable read-only memory module; loading memory contents from the memory device of the data processing system into the erasable programmable read-only memory; and causing a reset of the electronic memory device by a signal from the data processing system.

2. The method according to claim 1, wherein an EPROM is used as the erasable programmable read-only memory, the EPROM including at least one area that can be excluded from erasing, and communication is initiated between the EPROM and the data processing system using a subprogram stored in the at least one area that can be excluded from erasing.