| 摘要 |
The amount of communication with an external MCU can be reduced to reduce power consumption, and reduced power consumption and reduced cost can also be anticipated in the external MCU. An MCU first transmits old image data and new image data from image memory to a register by serial communication without modifying the data and with substantially no computational processing thereof. Combinations of waveform data necessary for displaying a color is then stored in a waveform latch circuit from a waveform data shift register and a combination of waveform data is selectively outputted by each of a group of 4-to-1 selectors. Data transmission from the external MCU from the waveform data shift register to the waveform latch circuit is thereby restricted to the initial stage.
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