ST72325AR7-Auto datasheet(166/243 Pages) STMICROELECTRONICS

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I2C bus interface (I2C)

ST72325xxx-Auto

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Doc ID 13770 Rev 3

Figure 70.

Transfer sequencing

7-bit Slave receiver:

7-bit Slave transmitter:

7-bit Master receiver:

7-bit Master transmitter:

10-bit Slave receiver:

10-bit Slave transmitter:

10-bit Master transmitter:

10-bit Master receiver:

S Address

Data1

Data2

.....

DataN

EV1

EV2

EV4

S Address

Data1

Data2

.....

DataN

EV1 EV3

EV3

EV3-1

EV4

Address

Data1

Data2

.....

DataN

EV5

EV6

EV7

Address

Data1

Data2

.....

DataN

EV5

EV6 EV8

EV8

Header

Address

Data1

.....

DataN

EV1

EV2

EV4

Sr Header A

Data1

....

DataN

EV1 EV3

EV3

EV3-1

EV4

Header

Address

Data1

.....

DataN

EV5

EV9

EV6 EV8

EV8

Header

Data1

.....

DataN

EV5

EV6

EV7

Legend:

S = Start, Sr = Repeated Start, P = Stop, A = Acknowledge, NA = Non-acknowledge, EVx = Event (with interrupt if ITE = 1)

EV1: EVF = 1, ADSL = 1, cleared by reading SR1 register.

EV2: EVF = 1, BTF = 1, cleared by reading SR1 register followed by reading DR register.

EV3: EVF = 1, BTF = 1, cleared by reading SR1 register followed by writing DR register.

EV3-1: EVF = 1, AF = 1, BTF = 1; AF is cleared by reading SR1 register. BTF is cleared by releasing the lines (STOP = 1, STOP = 0) or

by writing DR register (DR = FFh). Note: If lines are released by STOP = 1, STOP = 0, the subsequent EV4 is not seen.

EV4: EVF = 1, STOPF = 1, cleared by reading SR2 register.

EV5: EVF = 1, SB = 1, cleared by reading SR1 register followed by writing DR register.

EV6: EVF = 1, cleared by reading SR1 register followed by writing CR register (for example PE = 1).

EV7: EVF = 1, BTF = 1, cleared by reading SR1 register followed by reading DR register.

EV8: EVF = 1, BTF = 1, cleared by reading SR1 register followed by writing DR register.

EV9: EVF = 1, ADD10 = 1, cleared by reading SR1 register followed by writing DR register.

ST72325AR7-Auto Datasheet(PDF) 166 Page - STMicroelectronics

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