ST75256 display driver library

The ST75256 display controller is supported by the RAMTEX UC1611 display driver library package.
Full GUI display driver code. Processor and C compiler independent C source code.

ST75256 display controller characteristics

Below is a brief introduction to the main characteristics for the ST75256 Grey-level display controller (seen from a software driver design viewpoint).

For information about the ST75256 driver software support please go to the library description.

ST75256 device type

• Grey-level color display controller for use in small embedded systems with on-chip frame buffer and LCD screen driver.
• The ST75256 supports LCD screens with a size up to 256 x 162 pixels (WxH)
• On-chip LCD driver with voltage generator and software controlled LCD contrast regulation.

Frame buffer

• Grey-level pixel resolution (bits per pixel): 4 bit.
• ST75256 frame buffer organization: 256 Grey-level pixels on scan line, 162 lines.
• Frame buffer storage use vertical storage units with 2 pixels.

Processor interfaces on ST75256

• ST75256 parallel bus interface

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

• Serial bus interfaces on ST75256

  • SPI bus: 4-wire: /CS, CD, SDIN, SCLK.
  • I2C bus: 2-wire: SDIN, SCLK
• The bus interfaces are all supported by the ST75256 display driver software package.

Special ST75256 hardware features:

• 0-180, 90-270 degree frame buffer rotation with hardware support
• Support for screen driver contrast regulation in hardware.
• Full driver software support.

Display controller vendor

• Sitronix Technology Corp. https://www.sitronix.com.tw