AT32UC3B0512-A2UES ATMEL [ATMEL Corporation], AT32UC3B0512-A2UES Datasheet - Page 81
AT32UC3B0512-A2UES
Manufacturer Part Number
AT32UC3B0512-A2UES
Description
32-bit AVR Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT32UC3B0512-A2UES.pdf
(91 pages)
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12.2.3.3
Power Manager
3. SPI Glitch on RXREADY flag in slave mode when enabling the SPI or during the first
4. SPI CSNAAT bit 2 in register CSR0...CSR3 is not available
5. SPI disable does not work in SLAVE mode
6. SPI Bad Serial Clock Generation on 2nd chip_select when SCBR = 1, CPOL=1 and
1. PLL Lock control does not work
2. Wrong reset causes when BOD is activated
3. System Timer mask (Bit 16) of the PM CPUMASK register is not available
Fix/Workaround
When multiple CS are in use, if one of the baudrate equals to 1, the other must also equal 1
if CPOL=1 and CPHA=0.
transfer
In slave mode, the SPI can generate a false RXREADY signal during enabling of the SPI or
during the first transfer.
Fix/Workaround
1. Set slave mode, set required CPOL/CPHA.
2. Enable SPI.
3. Set the polarity CPOL of the line in the opposite value of the required one.
4. Set the polarity CPOL to the required one.
5. Read the RXHOLDING register.
Transfers can now befin and RXREADY will now behave as expected.
SPI CSNAAT bit 2 in register CSR0...CSR3 is not available.
Fix/Workaround
Do not use this bit.
SPI disable does not work in SLAVE mode.
Fix/Workaround
Read the last received data, then perform a Software Reset.
NCPHA=0
When multiple CS are in use, if one of the baudrate equals to 1 and one of the others doesn't
equal to 1, and CPOL=1 and CPHA=0, then an aditional pulse will be generated on SCK.
Fix/workaround
When multiple CS are in use, if one of the baudrate equals 1, the other must also equal 1 if
CPOL=1 and CPHA=0.
PLL lock Control does not work.
Fix/Workaround
In PLL Control register, the bit 7 should be set in order to prevent unexpected behaviour.
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.
System Timer mask (Bit 16) of the PM CPUMASK register is not available.
Fix/Workaround
Do not use this bit.
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