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AT32UC3A0512 Datasheet(PDF) 89 Page - ATMEL Corporation

Part # AT32UC3A0512
Description  High Performance, Low Power 32-Bit Atmel AVR Microcontroller
Download  98 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT32UC3A0512 Datasheet(HTML) 89 Page - ATMEL Corporation

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89
AT32UC3A
2.
USART RXBREAK problem when no timeguard
In asynchronous mode the RXBREAK flag is not correctly handled when the timeguard is 0
and the break character is located just after the stop bit.
Fix/Workaround
If the NBSTOP is 1, timeguard should be different from 0.
3.
USART Handshaking: 2 characters sent / CTS rises when TX
If CTS switches from 0 to 1 during the TX of a character, if the Holding register is not empty,
the TXHOLDING is also transmitted.
Fix/Workaround
None.
4.
USART PDC and TIMEGUARD not supported in MANCHESTER
Manchester encoding/decoding is not working.
Fix/Workaround
Do not use manchester encoding.
5.
USART SPI mode is non functional on this revision.
Fix/Workaround
Do not use the USART SPI mode.
6.
DCD is active High instead of Low.
In modem mode the DCD signal is assumed to be active high by the USART, butshould
have been active low.
Fix/Workaround
Add an external inverter to the DCD line.
7.
ISO7816 info register US_NER cannot be read
The NER register always returns zero.
Fix/Workaround
None.
15.5.8
Power Manager
1.
Voltage regulator input and output is connected to VDDIO and VDDCORE inside the
device
The voltage regulator input and output is connected to VDDIO and VDDCORE respectively
inside the device.
Fix/Workaround
Do not supply VDDCORE externally, as this supply will work in paralell with the regulator.
2.
Wrong reset causes when BOD is activated
Setting the BOD enable fuse will cause the Reset Cause Register to list BOD reset as the
reset source even though the part was reset by another source.
Fix/Workaround
Do not set the BOD enable fuse, but activate the BOD as soon as your program starts.
3.
PLL0/1 Lock control does not work
Lock Control does not work for PLL0 and PLL1.
32058KS–AVR32–01/12


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