OLED Display

OLED1 Xplained Pro features a 128 x 32 pixel white monochrome OLED display, UG-2832HSWEG04 from WiseChip Semiconductor Inc. The display has a SSD1306 display controller by Solomon Systech built in and is controlled via a 4-wire SPI interface + reset with the signals described in the table below. The datasheets for the display module or the display controller is not publicly available and has to be acquired from the respective manufacturers.

Info:

Note that the OLED display does not have a SPI MISO signal. That means that data can only be written to the display, not read.

Table 1. OLED Display Connections
Pin on EXT connector Signal Name Description
16 SPI_MOSI SPI master out, slave in signal. Used to write data to the display.
18 SPI_SCK SPI clock signal, generated by the master.
5 DATA_CMD_SEL Data/command select. Used to choose whether the communication is data to the display memory or a command to the LCD controller.
15 DISPLAY_SS SPI slave select signal, must be held low during SPI communication.
10 DISPLAY_RESET Reset signal to the OLED display, active low. Used during initialization of the display.