RA8802/8820 Chinese Character/Graphics LCD Controller Application Manual introduces RA8802/8820 interface, Chinese character ROM, LCD panel brightness adjustment, touch panel interface, system timing selection, hardware initialization, RA8802/8820 functional application introduction and other contents
The RA8802/8820 is an LCD controller that can display Chinese and English characters as well as graphics. It supports a maximum resolution of 320×240 pixels for the RA8802 and 240×240 pixels for the RA8820, and includes a built‑in 512 KB character ROM.
The document describes how the controller connects to 4‑bit or 8‑bit MCUs (8080 or 6800 style), the timing parameters, power‑on/reset sequence, and provides example code for initializing the controller and writing data to the display RAM. This manual is written in Chinese.
| System clock | 8 MHz |
|---|---|
| Operating voltage | 3.3 V |
| Address hold time | 10 ns |
| Address setup time | 63 ns |
| System cycle time | 800 ns |
| Strobe pulse width | 400 ns |
It operates from a 3.3 V supply.
The controller uses an 8 MHz system clock.