Texas Instruments C2000 Workshop Guide And Lab Manual

Inter-Integrated Circuit (I2C)
C2000 Microcontroller Workshop - Communications 13 - 21
I2C Arbitration
 Arbitration procedure invoked if two or more master-
transmitters simultaneously start transmission
 Procedure uses data presented on serial data bus (SDA) by
competing transmitters
 First master-transmitter which drives SDA high is overruled
by another master-transmitter that drives SDA low
 Procedure gives priority to the data stream with the lowest
binary value
1
0
1
0
0
1
0
1
1
0
0
1
0
1
SCL
SDA
Data from
device #1
Data from
device #2
Device #1 lost arbitration
and switches to slave-
receiver mode
Device #2
drives SDA
I2C Summary
I2C Summary
 Compliance with Philips I2C-bus
specification (version 2.1)
 7-bit and 10-bit addressing modes
 Configurable 1 to 8 bit data words
 Data transfer rate from 10 kbps up to
400 kbps
 Transmit FIFO and receive FIFO

Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English