The HD66765, 396-channel segment driver LSI, displays 132RGB-by-176-dot graphics on STN displays in 4096 colors. It is for driving STN color LCD displays to a maximum of 132RGB by 176 dots, in combination with the HD66764 common driver. The HD66765's bit-operation functions, 16bit high-speed bus interface, and high-speed RAM-write functions enable efficient data transfer and high-speed rewriting of data to the graphics RAM.