Abstract—The main objective of this paper is to develop enhanced energy consumption model to calculate and compare the hardware energy consumption of SPI and I2C digital serial interfaces in PIC microcontrollers and analyze using software simulation tools. Energy consumption of two digital serial interfaces (SPI and I2C) in PIC 16F877 has been measured and compared. Serial communication between two microcontroller(One Master-One Slave) is performed using SPI and I2C protocols, one-byte data has been transmitted from Master to Slave and displayed in two 7-segment LED’s and using a digital oscilloscope ,wave forms in SPI and I2C interface lines(to send clock signal ,one-byte data and the chip select ) were observed. Current probes are used to measure the current in all the interface lines and a graph is plotted for each line. Energy consumption is calculated based on the total current and the supplied voltage (5V). MPLAB IDE is used as a platform for writing the Embedded C code for Master as well as Slave microcontrollers for SPI and I2C serial communications. Proteus VSM (ISIS Professional) is used to model the virtual hardware system which works according to the hex. Files created in MPLAB IDE.

Index Terms—energy consumption, serial peripheral interface, inter integrated circuit, proteus VSM, MPLAB ID

Cite: Nithiyananthan. K and Nithya. S, "Enhanced Energy Consumption Model for Digital Serial Interfaces in Embedded Systems," International Journal of Electronics and Electrical Engineering, Vol. 3, No. 1, pp. 1-6, February 2015. doi: 10.12720/ijeee.3.1.1-6