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Abstract

A description is given of a program-controlled unit, having a CPU and a memory management device. The memory management device, which, at the instigation of the CPU, writes data output by the CPU to a memory device, or reads out data stored in the memory device and forwards them to the CPU. The program-controlled unit described is distinguished by the fact that a control device is provided, which prescribes at least in part the instants at which the memory management device has to perform the actions required for carrying out a data transfer. What can thus be achieved is that, in phases in which the program-controlled unit uses a different memory device instead of a normally used memory device, the program-controlled unit behaves in precisely the same way as would be the case if the program-controlled unit currently used the normally used memory device.

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First Claim