DISPLAY DATA TRANSMISSION SYSTEM TO DISPLAY DEVICE

摘要

PURPOSE:To simplify the constitution of system hardware by switching a sustain mode to a write mode to change the display content of one image plane only at the time of changing the image of a display device. CONSTITUTION:An address line Ax of an EPROM 4 is changed from a low level to a high level so that the write data is selected only when a W.END signal indicating the end of the data feeding is supplied by a driving control signal generating circuit 5, i.e., only when the image of the display device is to be changed. The sustain mode is set and the same display content is continuously displayed by utilizing the memory function of the display device so that the image of the display device is maintained if there is no need for changing the image of the display device. The need for display control circuits such as video RAM, refresh counter and multiplexer is thereby eliminated and the constitution of the system hardware is simplified.