Key facts
- Brand
- Qingyun
- Model
- QDM12864A-01
- Category
- Other Electronics
- Documents
- 2
- Languages
- ZH
- Last added
- 2012-03-16
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Qingyun QDM12864A-01 LCD Intelligent Display Terminal User Manual
The Qingyun QDM12864A-01 is a 128×64 dot‑matrix LCD intelligent display terminal that integrates the display controller and font ROM, allowing users to send serial commands for text and graphics without designing custom hardware. It simplifies development by providing built‑in fonts (8192 Chinese characters and 128 alphanumeric) and a ready‑to‑use command set.
The document covers product introduction, physical dimensions and connector definitions, rated electrical parameters, and the serial communication protocol (UART RS‑232/TTL). It also lists command codes for screen control, backlight adjustment, and baud‑rate configuration. This manual is written in Chinese.
Qingyun QDM12864A-01 specifications
| Display resolution | 128×64 dot matrix STN LCD |
|---|---|
| Power supply voltage | DC12V (allowed range DC9‑16V) |
| Rated current | 100 mA at 12 V with backlight on, 18 mA with backlight off |
| Backlight type | LED backlight with continuously adjustable brightness |
| Operating temperature range | -20 °C to 70 °C |
Source: Qingyun QDM12864A-01 LCD Intelligent Display Terminal User Manual
All Qingyun QDM12864A-01 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How many characters can be displayed per line?
The LCD screen can show four lines, each line displaying eight Chinese characters.
From: Qingyun QDM12864A-01 LCD Intelligent Display Terminal User Manual
How can the backlight be turned on or off?
Send command 0x5F to turn on the backlight and 0x5E to turn it off; brightness can be adjusted with command 0xEE followed by a value 1‑255.
From: Qingyun QDM12864A-01 LCD Intelligent Display Terminal User Manual
What voltage and current are required to power the QDM12864A-01 terminal?
The terminal operates from a DC12 V supply (acceptable range DC9‑25 V) and draws up to 150 mA, typically 80 mA with the backlight on and 18 mA with it off.
From: QINGYUN Innovation QDM12864A-01 LCD Intelligent Display Terminal User Manual
How can I adjust the backlight brightness of the display?
Send the command 0xEE followed by a LUM value between 1 and 255; the terminal will set the backlight intensity accordingly.
From: QINGYUN Innovation QDM12864A-01 LCD Intelligent Display Terminal User Manual