Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet
Product codes
AT91SAM9M10-G45-EK
492
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
Figure 31-24.
Receiver Time-out Block Diagram
gives the maximum time-out period for some standard baud rates.
31.7.3.13
Framing Error
The receiver is capable of detecting framing errors. A framing error happens when the stop bit of a received char-
acter is detected at level 0. This can occur if the receiver and the transmitter are fully desynchronized.
acter is detected at level 0. This can occur if the receiver and the transmitter are fully desynchronized.
A framing error is reported on the FRAME bit of the Channel Status Register (US_CSR). The FRAME bit is
asserted in the middle of the stop bit as soon as the framing error is detected. It is cleared by writing the Control
Register (US_CR) with the RSTSTA bit at 1.
asserted in the middle of the stop bit as soon as the framing error is detected. It is cleared by writing the Control
Register (US_CR) with the RSTSTA bit at 1.
16-bit Time-out
Counter
0
TO
TIMEOUT
Baud Rate
Clock
=
Character
Received
RETTO
Load
Clock
16-bit
Value
STTTO
D
Q
1
Clear
Table 31-11.
Maximum Time-out Period
Baud Rate
Bit Time
Time-out
bit/sec
μs
ms
600
1 667
109 225
1 200
833
54 613
2 400
417
27 306
4 800
208
13 653
9 600
104
6 827
14400
69
4 551
19200
52
3 413
28800
35
2 276
33400
30
1 962
56000
18
1 170
57600
17
1 138
200000
5
328