Datasheet

725
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
38.8.8 SMBUS Quick Command (Master Mode Only)
The TWI interface can perform a Quick Command:
1. Configure the master mode (DADR, CKDIV, etc.).
2. Write the MREAD bit in the TWI_MMR register at the value of the one-bit command to be sent.
3. Start the transfer by setting the QUICK bit in the TWI_CR.
Figure 38-15. SMBUS Quick Command
38.8.9 Read-write Flowcharts
The following flowcharts shown in Figure 38-17 on page 727, Figure 38-18 on page 728, Figure 38-19 on page 729,
Figure 38-20 on page 730 and Figure 38-21 on page 731 give examples for read and write operations. 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.
TXCOMP
TXRDY
Write QUICK command in TWI_CR
TWD
AS DADR R/W P