LCD controller enables graphic-mixed display

From Raio Technology Inc. comes the RA8870 TFT LCD controller that supports character and graphic-mixed display. The device is designed to meet the requirement of mid-size TFT module up to 640 x 480 pixels with characters or 2D graphic application. With internal RAM, RA8870 can support 65K color for 320 x 240 dots TFT Panel, 4K color for 640 x 240/320 x 480 display, or 4K color for 320 x 240 dots with two layers. With external RAM, it supports up to 65K color for 640 x 480 panel.

The embedded CGROM is capable to display the alphaset of international standard ISO 8859-1/2/3/4. It includes 256 x 4 characters and can satisfiies almost English or European language family countries. For graphic usage, RA8870 supports a 2D Block Transfer Engine that is compatible with 2D BitBLT function for processing the mass data transfer function. The geometric speed-up engine provides user an easy way to draw the programmable geometric shape by hardware, like line, square and circle. Besides, many powerful functions are combined with RA8870, such as screen rotation function, scroll function, graphic pattern, two-layer mixed display and font enlargement function. These functions will save user a large of software effort during development period.

RA8870 is a powerful and low-cost choice for color TFT application. To reduce the system cost, RA8870 proivdes low-cost 8080/6800 microcontroller I/F, a flexible four/five-wires touch panel controller, PWM for adjusting panel back-light and some GPIOs. With the RA8870 design-in, user can achieve an easy-to-use, low-cost and high performance system compared with the other solution.