HD66789 Datasheet, PDF (5/156 Pages) Renesas Technology Corp – 528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit

HD66789
Preliminary
Description
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.
Rev.0.12, May 09 2003, page 5 of 156