AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 515

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

24.7.7
Name:
Access Type:
Offset:
Reset Value:
This register, when read, returns details of the status of a receive. Once read, individual bits may be cleared by writing a
one to them. It is not possible to write a bit to one by writing to the register.
• OVR: Receive Overrun
• REC: Frame Received
• BNA: Buffer Not Available
9166C–AVR-08/11
31
23
15
7
-
-
-
-
This bit is set when the DMA interface is unable to store the receive frame to memory, either because the bus was not granted in
time or because a bus error was returned. The buffer is recovered if this happens.
Write a one to clear this bit.
0: No receive overrun detected.
1: Receive overrun detected.
This bit is set when one or more frames have been received and placed in memory.
Write a one to clear this bit.
0: No frame received.
1: Frame received.
The DMA reads 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.
Write a one to clear this bit.
0: Buffer is available.
1: Buffer is not available because an attempt was made to get a new buffer and the pointer indicated that it was owned by the
processor.
Receive Status Register
30
22
14
6
-
-
-
-
RSR
Read/Write
0x20
0x00000000
29
21
13
5
-
-
-
-
28
20
12
4
-
-
-
-
27
19
11
3
-
-
-
-
OVR
26
18
10
2
-
-
-
REC
25
17
9
1
-
-
-
AT32UC3C
BNA
24
16
8
0
-
-
-
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