RA8870 is a TFT LCD controller which supports the character and graphic mixed display. It is designed to meet the requirement of middle size TFT module up to 640x480 pixels with characters or 2D graphic application. With internal RAM, RA8870 can supports 65K color for 320x240 dots TFT Panel, 4K color for 640x240/320x480 display , or 4K color for 320x240 dots with 2-Layers. With external RAM, it supports up to 65K color for 640x480 panel.
The embedded CGROM is capable to display the alphaset of international standard ISO 8859-1/2/3/4. It includes 256x4 characters and can satisfies almost English or Eurpean language family countries. For graphic usage, RA8870 supports a 2D Block Transfer Engine(BTE) that is compatible with 2D Bit BLT 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, 2-layer mixed display and font enlargement function. These functions will save user a large of software effort during developement period.
RA8870 is a powerful and cheap choice for color application. To reduce the system cost, RA8870 provide low cost 8080/6800 MCU I/F, a flexible 4/5-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 performace system compared with the other solution.
Support Text/Graphic Mixed Display Mode
Supports images sizes: 640 x 480
Embedded 230KB DDRAM
256/4K/65K Colors
Supporting 8/12/16-bits Generic RGB Interface
Embedded 10K ROM with 8x16 Character
Support GB-2312 and BIG-5 Encoding with External Font ROM
Powerful Block Scrolling for Vertical or Horizontal Direction
Screen Display Rotaion
Supports Block Transfer Engine (BTE)
Embedded Geometric Speed-up Engine
Font Enlargement for Horizontal or Vertical Direction
Flexible TCON Block Compatible with Most Analog Panel
Supporting User-defined Characters and Patterns
2 Programmable PWM for Back-light Adjusting
Text Cursor for Character Writing
32x32 Pixel Graphic Cursor Funtion
Embedded 4/5-wires Touch Panel Controller
| Functions | RA8872 | RA8870 | RA8875 |
|---|---|---|---|
| Product Guide | RA8872 : PDF | RA8870 : PDF | RA8875 : PDF |
| Resolution(Max) | 320 x 240 | 640 x 480 | 800 x 480 |
| Colors(Max) | 256 / 4K / 65K | 256 / 4K / 65K | 256 / 4K / 65K |
| Panel Type | CMOS / TTL | CMOS / TTL | CMOS / TTL |
| Parallel MPU Interface | 8-Bits | 8/16-Bits | 8/16-Bits |
| Serial MCU I/F | -- | -- | SPI 3 | 4 / IIC |
| Embedded Display RAM | 230KB | 230KB | 768KB |
| Embedded ASCII Font | ISO-8859 Latin 1~4 |
ISO-8859 Latin 1~4 | ISO-8859 Latin 1~4 |
| External Font ROM I/F | -- | Parallel | Serial |
| Touch Panel Controller | 4-Wires | 4/5-Wires | 4-Wires |
| Block Transfer Engine | V | V | V |
| Geometric Speed-up Engine | V | V | V |
| Dual Pages Mode | V | V | V |
| Horizontal Scroll | V | V | V |
| Vertical Scroll | V | V | V |
| Graphic/Font Rotation | V | V | V |
| Programmable Text Cursor | V | V | V |
| Support Graphic Cursor | V | V | V |
| User-defined Characters | V | V | V |
| UART I/F | -- | -- | V |
| PWM O/P | 2 | 2 | 2 |
| Smart Key-Scan | -- | -- | 4x5 |
| GPIO | 6 | 6 | 9 |
| Clock Source | X'tal + PLL | X'tal + PLL | X'tal + PLL |
| Operation Voltage | 3.0 ~ 3.6V | 3.0 ~ 3.6V | 3.0 ~ 3.6V |
| Package | TQFP-100 | TQFP-128 | LQFP-100 |
| Operation Temperature | -30 ~ +85℃ | -30 ~ +85℃ | -30 ~ +85℃ |