Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsDev KitsPCB design board

731

42023E–SAM–07/2013

ATSAM4L8/L4/L2

27.9.8 Status Register

Name:

SR

Access Type: Read-only

Offset: 0x1C

Reset Value: 0x00000002

• HSMCACK: ACK in HS-mode Master Code Phase Received

This bit is one when an ACK is erroneously received during a HS-mode master code phase.

This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).

• MENB: Master Interface Enable

0: Master interface is disabled.

1: Master interface is enabled.

• STOP: Stop Request Accepted

This bit is one when a STOP request caused by writing a one to CR.STOP has been accepted, and transfer has stopped.

This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).

• PECERR: PEC Error

This bit is one when a SMBus PEC error occurred.

This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).

•TOUT: Timeout

This bit is one when a SMBus timeout occurred.

This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).

• ARBLST: Arbitration Lost

This bit is one when the actual state of the SDA line did not correspond to the data driven onto it, indicating a higher-priority

transmission in progress by a different master.

This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).

• DNAK: NAK in Data Phase Received

This bit is one when no ACK was received form slave during data transmission.

This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).

• ANAK: NAK in Address Phase Received

This bit is one when no ACK was received from slave during address phase

This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).

• BUSFREE: Two-wire Bus is Free

This bit is one when activity has completed on the two-wire bus.

Otherwise, this bit is cleared.

31 30 29 28 27 26 25 24

--------

23 22 21 20 19 18 17 16

------HSMCACKMENB

15 14 13 12 11 10 9 8

- STOP PECERR TOUT - ARBLST DNAK ANAK

76543210

- - BUSFREE IDLE CCOMP CRDY TXRDY RXRDY