Display driver IC and electronic device using same

Abstract

A display driver IC which adopts a serial transmission system to reduce the number of terminal pins, transmits a command and data efficiently and also can speed-up data transmission. The display driver IC comprises an interface circuit to which signals from an external MPU are input, a command decoder for decoding command data input from the external MPU through the interface circuit, a storage section in which display data input from the external MPU through the interface circuit is written; and a display driving section for driving a display on the basis of the display data written in the storage section. The interface circuit comprises a first input terminal to which a serial data input signal is input, a second input terminal to which a serial clock signal is input and a third input terminal to which a chip select signal is input. The serial data input signal uses, as a unit data column, 9 bits including data groups of 8 bits which the external MPU simultaneously processes and identification data D/C of one bit which identifies whether the data groups are groups of the command data or the display data.

Dependencies are inferred from the claim text.