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share awesome hardware 0.95inch RGB OLED User Manual 0.95inch RGB OLED User Manual 1. 2. Key Parameters Driver Chip SSD1331 Interface SPI Resolution 96x64 Display Size 0.95inch Dimension 31.7mm*37mm Colors RGB, 65K colorful Visible Angle >160° Operating Temp. (℃) -20~70 Storage Temp. (℃) -30~80 Operation Description We will illustrate the usage of the module with an example by connecting Waveshare Open103R development board (STM32F103R MCU on board). 2.1. Hardware connections Connect module to the SPI2 interface of Open103R development board, power up. OLED displays information shows as below. Figure 1: OLED information display 1 nd Rev 2.4.2, October 22 2015 share awesome hardware 0.95inch RGB OLED User Manual 2.2. Software configuration Open the project file .\IDE\ OLED.uvproj in Keil. After compiling successfully, download the project to Open103R development board. 3. Pin descriptions Table 1: Pin descriptions Pin No. Symbol Descriptions 1 VCC Positive power supply (3.3~5V input voltage) 2 GND Ground 3 NC NC 4 DIN Data 5 CLK Clock 6 CS Chip 7 D/C This is Data/Command control pin. When it is pulled HIGH (i.e. connect to VDD), the data at D[7:0] is treated as data. When it is pulled LOW, the data at D[7:0] will be transferred to the command register. 8 RES Reset signal input pin (active LOW) SSD1331 RGB OLED SPI interface. The serial interface consists of serial clock CLK, serial data DIN, DC and CS. DIN is shifted into an 8-bit shift register on every rising edge of CLK in the order of Bit7, Bit6… Bit0. DC is sampled on every eighth clock and the data byte in the shift register is written to the Display Data RAM or command register in the same clock. Under serial mode, only write operations are allowed. Table 2: Control pins of Serial interface Function CS DC Write command L L Write data L H 2 nd Rev 2.4.2, October 22 2015 0.95inch RGB OLED User Manual share awesome hardware Figure 2: Write procedure in SPI mode Please refer to SSD1331-Revision 1.2.pdf for more detail about SSD1331. 3 nd Rev 2.4.2, October 22 2015