Datasheet

464

AT32UC3A

29.7.7 Receive Status Register

Access Type: Read/Write

This register, when read, provides details of the status of a receive. Once read, individual bits may be cleared by writing 1

to them. It is not possible to set a bit to 1 by writing to the register.

• BNA: Buffer Not Available

An attempt was made to get a new buffer and the pointer indicated that it was owned by the processor. The DMA rereads

the pointer each time a new frame starts until a valid pointer is found. This bit is set at each attempt that fails even if it has

not had a successful pointer read since it has been cleared.

Cleared by writing a one to this bit.

• REC: Frame Received

One or more frames have been received and placed in memory. Cleared by writing a one to this bit.

• OVR: Receive Overrun

The DMA block was unable to store the receive frame to memory, either because the bus was not granted in time or

because a not OK hresp(bus error) was returned. The buffer is recovered if this happens.

Cleared by writing a one to this bit.

31 30 29 28 27 26 25 24

– – – – – – – –

23 22 21 20 19 18 17 16

– – – – – – – –

15 14 13 12 11 10 9 8

– – – – – – – –

7 6 5 4 3 2 1 0

– – – – – OVR REC BNA

32058K

AVR32-01/12