Using Serial Peripheral Interface (SPI) with Microchip PIC18 Families Microcontroller | ermicroblog
How to use SPI Communication in STM32 Microcontroller (STM32F103C8)
1set Mcp2515 Can Bus Shield Board Spi Interface 9 Pins Standard Sub-d Connector Expansion Module Dc 5-12v For Arduino Seeeduino - Integrated Circuits - AliExpress
How to Use SPI Communication on the Arduino - Circuit Basics
Serial Peripheral Interface - Wikipedia
ICSP and SPI - Project Guidance - Arduino Forum
Need more GPIO on your MCU? Try the Serial Peripheral Interface (SPI)