Template: Pico OLED 1.3 Spec

Overview

This 1.3inch OLED display module is designed for Raspberry Pi Pico, 64 x 128 pixels, supports SPI/I2C interface.

Features

• Adopts both 4-wire SPI and I2C interface, better compatibility, fast data rate.
• 2 x user buttons for easy interaction.
• Standard Raspberry Pi Pico header, supports Raspberry Pi Pico series boards.

Specification

Working voltage	2.6V ~ 5.5V
Current	40mA
Controller	SH1107
Interface	4-wire SPI / I2C
Resolution	64 x 128 Pixels
Pixel size	0.15 × 0.15mm
Display area	14.70 × 29.42mm
Outline dimension	52.00 x25.00(mm)

Pinout

OLED and its controller

This OLED integrates the SH1107 controller which has 128 x 128 bits SRAM, and supports 128 x 128 resolution. The controller features SPI/IIC/ 6800/8080 interface and 256 brightness levels. The resolution of this 1.3inch OLED is only 64 x 128, and only half of the SRAM is used.
This OLED uses four-line SPI and I2C interface for communicating, which supports higher compatibility and speed.

Protocol

Note: The MISO pin is hidden, for more details, you can refer to Datasheet Page11.
CS: Chip selection of the slaver, the chip is activated when CS is Low;
SI（D1）: This is MOSI pin, the pin is used to transmit data from master to slaver;
SCL（D0）is the SPI clock
A0: This is the DC pin, it is used to determine the data input, DC=0: command is sent;

SPI communication has data transfer timing, which is combined by CPHA and CPOL.
CPOL determines the level of the serial synchronous clock at an idle state. When CPOL = 0, the level is Low. However, CPOL has little effect on the transmission.
CPHA determines whether data is collected at the first clock edge or at the second clock edge of the serial synchronous clock; when CPHL = 0, data is collected at the first clock edge.
According to the figure, SCL is high in idle and it starts to transmit data at the second edge. therefore the timing is Mode 3 (0x11). Data is transmitted in MSB format.