11-08-2017, 01:54 PM
The Serial Peripheral Interface or SPI bus is a synchronous serial data link, a de facto standard, named by Motorola, which operates in full duplex mode. It is used for short distance, single-master communications.
Working
The I2C bus has become one of the most important microcontroller subsystems used to connect multiple IC devices with a microcontroller. It is unique in its ability to maximize hardware efficiency and circuit simplicity. The I2C bus uses only bi-directional data lines to communicate with the microcontroller. This bus is called Inter IC or I2C bus. All compatible I2C-bus devices incorporate an on-chip interface that allows them to communicate directly with each other via I2C-bus. The I2C protocol specification can support up to 128 devices connected to the same bus. Today many I2C IC devices available on the market such as EEPROM series, I / O Expander, RTC, ADC, DAC, Sensors, etc.
The I2C protocol uses the master and slave method, the master which in most cases is a microcontroller while the slave can be any I2C device such as serial EEPROM, RTC, etc. The I2C protocol uses only two signals: clock and data. The Clock is referred to as SCL (Serial Clock) while the data is referred to as SDA (Serial Data).
Working
The I2C bus has become one of the most important microcontroller subsystems used to connect multiple IC devices with a microcontroller. It is unique in its ability to maximize hardware efficiency and circuit simplicity. The I2C bus uses only bi-directional data lines to communicate with the microcontroller. This bus is called Inter IC or I2C bus. All compatible I2C-bus devices incorporate an on-chip interface that allows them to communicate directly with each other via I2C-bus. The I2C protocol specification can support up to 128 devices connected to the same bus. Today many I2C IC devices available on the market such as EEPROM series, I / O Expander, RTC, ADC, DAC, Sensors, etc.
The I2C protocol uses the master and slave method, the master which in most cases is a microcontroller while the slave can be any I2C device such as serial EEPROM, RTC, etc. The I2C protocol uses only two signals: clock and data. The Clock is referred to as SCL (Serial Clock) while the data is referred to as SDA (Serial Data).