at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 282
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at91rm3400
Manufacturer Part Number
at91rm3400
Description
Atmel Advanced At91 Arm Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.AT91RM3400.pdf
(461 pages)
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Framing Error
282
AT91RM3400
Table 50. Maximum Time-out Period
The receiver is capable of detecting framing errors. A framing error happens when the stop bit
of a received character 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.
Figure 103. Framing Error Status
Baud Rate
Baud Rate
200000
bit/sec
14400
19200
28800
33400
56000
57600
FRAME
RXRDY
US_CR
1 200
2 400
4 800
9 600
600
Clock
Write
RXD
Start
Bit
D0
D1
D2
D3
D4
Bit Time
1 667
D5
833
417
208
104
µs
69
52
35
30
18
17
5
D6
D7
Parity
Bit
Stop
Bit
RSTSTA = 1
Time -out
109 225
54 613
27 306
13 653
6 827
4 551
3 413
2 276
1 962
1 170
1 138
328
ms
1790A–ATARM–11/03
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