LD7138 OLED display driver library

The LD7138 display controller is supported by the RAMTEX S6D0129 display driver library package.
Full GUI display driver C source code. Processor and C compiler independent.

LD7138 display controller characteristics

Below is a brief introduction to the main characteristics for the LD7138 RGB display controller (seen from a software driver design viewpoint).

For information about the LD7138 driver software support please go to the library description.

LD7138 device type

  • COG RGB color display controller for use in small embedded systems with on-chip frame buffer and OLED screen driver.
  • The LD7138 supports OLED screens with a size up to 128 x 128 pixels (WxH)
  • On-chip OLED driver with voltage generator and software controlled intensity regulation.

Frame buffer

  • RGB pixel resolution (bits per pixel): 16-bit.
  • LD7138 frame buffer organization: 128 RGB pixels on scan line, 128 lines.

Processor interfaces on LD7138

  • LD7138 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 LD7138
    • SPI bus: 4-wire: /CS, DC, SDIN, SCLK.
    • I2C bus: 2-wire: SDIN, SCLK
  • The bus interfaces are all supported by the LD7138 display driver software package.

Special LD7138 hardware features:

  • 0-180, 90-270 degree frame buffer rotation with hardware support. Portrait mode, landscape mode.
  • Software controlled intensity regulation.
  • Full driver software support.

Display controller vendor

  • SOLOMON SYSTECH Ltd. https://www.solomon-systech.com

Seeking a display controller equivalent to LD7138?

Check these:

SSD1339 SSD1338 SSD0332 SSD1331 SSD1332 SSD1333 SSD1335 SSD1351 SSD1353

These display controllers have similar internal configuration and graphic rendering features.
The differences are primarily related to display screen sizes or available bus interface types.