I2C -  Software Addressed Protocol
	   Clocked Protocol
Pins: SDA = Serial Data
	  SCL = Serial Clock

Speeds up to 400Khz, 1 Mhz

SPI - Serial Protocol Interface
	Hardware Addressed Protocol
	Clocked Protocol

Pins: MOSI (Master Out Slave In)
	  MISO (Master In Slave Out)
	  SCL  Serial Clock
	  SS or nCS (Slave Select or not Chip		Select)

Up to 20Mhz

USART Two Wire, Non Clocked Protocol

Pins:
TX: Transmit
RX: Receive

Baudrate = bits per second (sorta)

frequency = 100 / 1 time in seconds

9600
115200
38400