Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK 데이터 시트

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SAM9G25 [DATASHEET]

11032C–ATARM–25-Jan-13

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.

The following flowcharts shown in 

, 

,

 and 

 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

A

S

DADR

R/W

P