Data Sheet

1.5inch OLED Module User Manual

The timing of SPI is composed of CPHA and CPOL. The timing controls the data

transmission of SPI communication.

CPOL (Clock polarity): Controls the steady state value of the clock when no data is

transferred. CPOL=0, SCK pin is low at idle state.

CPHA (Clock phase): Control when the first data is captured, at the first edge or the second

edge. CPHA=0, data is captured at the first edge.

The combination of CPOL and CPHA are the four communication modes of SPI. We

generally use SPI0, that is CPHA=0, CPOL=0.

3. I2C Communication Protocol

For detailed information, please visit Datasheet Page 23

First, transfer 7-bits address of slave device plus 1-bit read/write bit. Then waiting for

response from slave device. It is similar to most of I2C communication. Users can control the DC

pin to change the address of slave device.

Second, transfer 1-bit data bit plus 1-bit command control bit plus 6-bits control byte. The

most important is the command control bit. If the bit is set 0, it means the data transferred is

command, and if it is set 1, data will be transmitted.

Finally, 8-bits data is transferred.

Note: OLED data cannot be read when the controller communicating via serial port for.

HOW TO USE

We provide STM32, Arduino and Raspberry Pi (BCM2835, WiringPi and Python) demo code.

The OLED can be used to:

1. Drawing point, line, figures and circles. And can set their size, solid/dashed, linewidth, full or

nor, etc.

2. Supports English characters display and provide five common fonts

3. Support display Bitmap and 16-bit grey level images.

STM32

1. Hardware connection (Based on XNUCLEO-F103RB)

XNUCLEO-F103RB

VCC

3V3/5V

GND

DIN

PA7

CLK

PA5

PB6

PA8

RST

PA9