The Serial Peripheral Interface (SPI) is one of the popular embedded serial communications widely supported by many of today's chip manufacture and it considered as one of the fastest serial data transfer interface for the embedded system. Because of its special in/out register configuration, the SPI master device could transfer its data and at the same time it receive a data from the SPI slave device with the clock speed as high as 10 MHz. Beside its superior data transfer speed; SPI also use a very simple data transfer protocol compared to the other serial data transfer methods. For more information please visit www.ermicro.com

MICROCHIP C18 PIC18F14K22 MCP23S17 MCP42100 SPI UART ADC

The I2C (read as I square C) bus has been introduced in 1980 by Philips, and has become a de-facto world standard for data exchange between Microcontroller and various devices such as temperature sensor, ADC (analog to digital converter), DAC (digital to analog converter), I/O expander, EEPROM, and many more. For more information please visit www.ermicro.com

PIC18F14K22 24LC02B EEPROM HD44780U I2C LCD MCP23008 MCP9801 PCA8574 TC1321

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Led display for a 3 axis accelerometer. Using a PIC18F14K22 microcontroller and a freescale MMA845 accelerometer. Double tap function changes from a bar graph to a dot. Works :)

Accelerometer display LED PIC18F