Inter-Integrated Circuit (I2C)
12 - 16 TMS320F2837xD Microcontroller Workshop - Communications
Inter-Integrated Circuit (I2C)
Inter-Integrated Circuit (I2C)
Philips I2C-bus specification compliant, version 2.1
Data transfer rate from 10 kbps up to 400 kbps
Each device can be considered as a Master or Slave
Master initiates data transfer and generates clock signal
Device addressed by Master is considered a Slave
Multi-Master mode supported
Standard Mode – send exactly n data values (specified in register)
Repeat Mode – keep sending data values (use software to initiate a
stop or new start condition)
28x
I2C
I2C
Controller
I2C
EPROM
28x
I2C
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Pull-up
Resistors
V
DD
Serial Data (SDA)
Serial Clock (SCL)
The I2C provides an interface between devices that are compliant I2C-bus specification version
2.1 and connect using an I2C-bus. External components attached to the 2-wire serial bus can
transmit or receive 1 to 8-bit data to or from the device through the I2C module.
I2C Block Diagram
TX FIFO
RX FIFO
I2CDXR
I2CDRR
I2CXSR
I2CRSR
Clock
Circuits
SDA
SCL
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