The LCD controller 60 is supplied through the host I/O 66 with the image data such as still image data from the not-shown CPU and moving image data from the DSP or MPU. The LCD controller 60 is further supplied through the host I/O 66 from the not-shown CPU with the command data such as the contents of the register for controlling the signal driver 30 or the scan driver 50 and the data for setting