Datasheet

577
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
32.10.6 Read Write Flowcharts
The flowchart shown in Figure 32-32 on page 577 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.
Figure 32-32. 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
No
No
No
No
No
No
No
No