AT32UC3B0256_08 Datasheet, PDF (59/65 Pages) ATMEL Corporation – AVR32 32-Bit Microcontroller

AT32UC3B
4. USART PDC and TIMEGUARD not supported in MANCHESTER
Manchester encoding/decoding is not working.
Fix/Workaround
Do not use manchester encoding.
14.2.10 HMATRIX
5. USART SPI mode is non functional on this revision
Fix/Workaround
Do not use the USART SPI mode.
14.2.11
1. HMatrix fixed priority arbitration does not work
Fixed priority arbitration does not work.
Fix/Workaround
Use Round-Robin arbitration instead.
Clock caracteristic
14.2.12 FLASHC
1. PBA max frequency
The Peripheral bus A (PBA) max frequency is 30MHz instead of 60MHz.
Fix/Workaround
Do not set the PBA maximum frequency higher than 30MHz.
1. The address of Flash General Purpose Fuse Register Low (FGPFRLO) is 0xFFFE140C
on revB instead of 0xFFFE1410.
Fix/Workaround
None.
2. The command Quick Page Read User Page(QPRUP) is not functional.
Fix/Workaround
None.
3. PAGEN Semantic Field for Program GP Fuse Byte is WriteData[7:0], ByteAddress[1:0]
on revision B instead of WriteData[7:0], ByteAddress[2:0].
Fix/Workaround
None.
14.2.13 RTC
1. Writes to control (CTRL), top (TOP) and value (VAL) in the RTC are discarded if the
RTC peripheral bus clock (PBA) is divided by a factor of four or more relative to the
HSB clock.
Fix/Workaround
Do not write to the RTC registers using the peripheral bus clock (PBA) divided by a factor of
four or more relative to the HSB clock.
2. The RTC CLKEN bit (bit number 16) of CTRL register is not available..
Fix/Workaround
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32059GS–AVR32–04/08