HD66789

The HD66789 handles 262,144 TFT colors and can drive a TFT color liquid crystal display of 176 RGB x 240 dots with an incorporated RAM compliant to graphics display of 176 RGB x 240 dots at maximum, and a 528-channel source driver outputs. The HD66789 incorporates a gate driver and a power circuit for driving liquid crystal display to drive a TFT panel with a single chip. The HD66789's bit-operation functions, 8/9/16/18-bit high-speed bus interface, and high-speed RAM-write functions enable efficient transfer of data and high-speed data update on a graphics RAM.

The HD66789's 6/16/18-bit RGB interface (VSYNC, HSYNC, DOTCLK, ENABLE, and PD 17 to 0) and VSYNC interface (system interface + VSYNC) provide an interface for moving picture display. With a window address function that facilitates the moving picture display in an arbitrary area and enables simultaneous display of moving pictures and the contents of the internal RAM, the HD66789 enables moving picture display not constrained by the still picture area. Accordingly, the data transmission is reduced to minimum, thereby saving power consumed by a system as a whole when displaying moving pictures. The HD66789 supports power-saving operation up to the power supply voltage of 2.4V with a voltage follower circuit that generate voltage to drive liquid crystal. The HD66789 also incorporates 8-color display and standby functions that allow precise power control by software. These features make this LSI the ideal solution for any medium or small-sized portable battery-driven products such as digital cellular phones supporting WWW browsers or small PDA, where long battery life and board size are major concern.