Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD データシート
製品コード
AT32UC3A3-XPLD
742
32072H–AVR32–10/2012
AT32UC3A3
27.8.3.20
Pipe n Error Register
Register Name:
UPERRn, n in [0..7]
Access Type:
Read/Write
Offset:
0x0680 + (n * 0x04)
Reset Value:
0x00000000
• COUNTER: Error Counter
This field is incremented each time an error occurs (CRC16, TIMEOUT, PID, DATAPID or DATATGL).
This field is cleared when receiving a good usb packet without any error.
When this field reaches 3 (i.e., 3 consecutive errors), this pipe is automatically frozen (UPCONn.PFREEZE is set).
Writing 0b00 to this field will clear the counter.
• CRC16: CRC16 Error
This bit is set when a CRC16 error has been detected.
Writing a zero to this bit will clear the bit.
Writing a one to this bit has no effect.
• TIMEOUT: Time-Out Error
This bit is set when a Time-Out error has been detected.
Writing a zero to this bit will clear the bit.
Writing a one to this bit has no effect.
• PID: PID Error
This bit is set when a PID error has been detected.
Writing a zero to this bit will clear the bit.
Writing a one to this bit has no effect.
• DATAPID: Data PID Error
This bit is set when a Data PID error has been detected.
Writing a zero to this bit will clear the bit.
Writing a one to this bit has no effect.
• DATATGL: Data Toggle Error
This bit is set when a Data Toggle error has been detected.
Writing a zero to this bit will clear the bit.
Writing a one to this bit has no effect.
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
-
COUNTER
CRC16
TIMEOUT
PID
DATAPID
DATATGL