Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Hoja De Datos

 577

SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

The flowchart shown in 

 gives an example of read and write operations in Slave mode. A

polling or interrupt method can be used to check the status bits. The interrupt method requires that the interrupt
enable register (TWI_IER) be configured first.

Read Write Flowchart in Slave Mode

Set the SLAVE mode:

SADR + MSDIS + SVEN

SVACC   1 

TXCOMP   1 

GACC   1 

Decoding of the 

programming se uence

Prog se

OK 

Change SADR 

SVREAD   0 

Read Status Register

RXRDY  0 

Read TWI RHR

TXRDY  1 

EOSACC   1 

Write in TWI THR

END

GENERAL CALL TREATMENT

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