I2C Operating Modes And Data Formats - Texas Instruments TMS320F2837 D Series Workshop Manual And Lab Manual

I2C Operating Modes and Data Formats

Operating Mode
Slave-receiver mode
Slave-transmitter mode
Master-receiver mode
Master-transmitter mode
7-Bit Addressing Format
1
S
10-Bit Addressing Format
1
S
Free Data Format
1
S
TMS320F2837xD Microcontroller Workshop - Communications
I2C Operating Modes
Description
Module is a slave and receives data from a master
(all slaves begin in this mode)
Module is a slave and transmits data to a master
(can only be entered from slave-receiver mode)
Module is a master and receives data from a slave
(can only be entered from master-transmit mode)
Module is a master and transmits to a slave
(all masters begin in this mode)
I2C Serial Data Formats
7 1
Slave Address R/W ACK
7 1
11110AA R/W ACK AAAAAAAA
n 1
Data ACK
R/W = 0 – master writes data to addressed slave
R/W = 1 – master reads data from the slave
n = 1 to 8 bits
S = Start (high-to-low transition on SDA while SCL is high)
P = Stop (low-to-high transition on SDA while SCL is high)
1 n 1
Data
ACK
1 8 1
ACK
n 1
Data ACK
Inter-Integrated Circuit (I2C)
n 1 1
Data
ACK P
n 1 1
Data
ACK P
n 1 1
Data
ACK P
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