Abstract: Programmable circuit for controlling a liquid crystal display (LCD controller), possibly through the intermediary of driver stages, for two bus structures, one of which serves for the exchange of data with a computer while the other serves for the exchange of data with at least one addressable memory which is associated with the liquid crystal display (LCD), with both bus structures being configured as complete, parallel bus structures composed of address, data and control lines which, when the control circuit is in a given switching state and possibly in response to a corresponding additional signal from the computer, are interconnected in such a manner that data exchange is possible between the memory associated with the liquid crystal display and the computer.