SISTEMA DE TRANSMISION DE DATOS CON UN TERMINAL Y UNA DISPOSICION DE SOPORTE DE DATOS PORTATIL Y PROCEDIMIENTO PARA RECARGAR LA DISPOSICION DE SOPORTE DE DATOS PORTATIL POR MEDIO DEL TERMINAL.

摘要

In a data transfer system having at least one terminal and at least one portable data carrier configuration, for example a chip card, and a method of recharging the portable data carrier configuration through the use of the terminal, an area of a non-volatile memory of the card representing a monetary value is subdivided into two value areas of which only one is activatable into a non-volatile state and the other can only be activated temporarily in each case. When the card is recharged, the new counter status is written into the value area which has initially only been activated temporarily. It is only after checking the correct writing that this value area is switched in such a way that it is activatable into a non-volatile state.