LT7681 TFT display driver library

The LT7681 display controller is supported by the RAMTEX S6D0129 display driver library package.
Full GUI display driver C source code. Processor and C compiler independent.

LT7681 display controller characteristics

Below is a brief introduction to the main characteristics for the LT7681 RGB display controller (seen from a software driver design viewpoint).

For information about the LT7681 driver software support please go to the library description.

LT7681 device type

• COG RGB color display controller for use in small embedded systems with on-chip frame buffer and TFT screen driver.
• The LT7681 supports TFT screens with a size up to 1280 x 1024 pixels (WxH)
• On-chip TFT driver with voltage generator

Frame buffer

• RGB pixel resolution (bits per pixel): 8-bit, 16-bit, 24 bit.
• LT7681 frame buffer organization: 1280 RGB pixels on scan line, 1024 lines.

Processor interfaces on LT7681

• LT7681 parallel bus interface

  • Parallel bus types: 8080 bus type and 6800 bus type
  • Parallel bus size: 8-bit, 16-bit.
  • Addressing concept: Indexed bus interface (1 chip select pin + 1 address bit pin (Data/Command))

• Serial bus interfaces on LT7681

  • SPI bus: 3-wire: /CS, SDIN, SCLK. SPI-3 SPI-4 is separate MOSI and MISO lines. Address is specified as first SPI byte.
  • I2C bus: 2-wire: SDIN, SCLK
  • In SPI bus mode the frame buffer memory can not be read.
• The bus interfaces are all supported by the LT7681 display driver software package.

Special LT7681 hardware features:

• Frame Buffer size set equal to Display size..
• 0-180, 90-270 degree frame buffer rotation with hardware support. Portrait mode, landscape mode.
• Full driver software support.

Display controller vendor

• Shenzen Levetop Ltd. https://www.levetop.cn