AT32UC3A0512-ALTES ATMEL [ATMEL Corporation], AT32UC3A0512-ALTES Datasheet - Page 78

• Manufacturer Part Number: AT32UC3A0512-ALTES
• Description: AVR32 32-Bit Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

15.4.8
32058FS–AVR32–08/08
Power Manager
1.
2. Wrong reset causes when BOD is activated
3. PLL0/1 Lock control does not work
4. Peripheral Bus A maximum frequency is 33MHz instead of 66MHz.
5.
6.
7. If the BOD level is higher than VDDCORE, the part is constantly under reset
8. System Timer mask (Bit 16) of the PM CPUMASK register is not available.
Add an external inverter to the DCD line.
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.
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.
Lock Control does not work for PLL0 and PLL1.
Fix/Workaround
In PLL0/1 Control register, the bit 7 should be set in order to prevent unexpected behaviour.
Fix/Workaround
Do not set PBA frequency higher than 33 MHz.
In sleep mode stop all PCx pins will be controlled by GPIO module instead of oscillators.
This can cause drive contention on the XINx in worst case.
Fix/Workaround
Before entering stop mode set all PCx pins to input and GPIO controlled.
Fix/Workaround
Do not set the HSB/CPU speed higher than 50MHz when the firmware generate exceptions.
If the BOD level is set to a value higher than VDDCORE and enabled by fuses, the part will
be in constant reset.
Fix/Workaround
Apply an external voltage on VDDCORE that is higher than the BOD level and is lower than
VDDCORE max and disable the BOD.
Fix/Workaround
Do not use this bit.
Voltage regulator input and output is connected to VDDIO and VDDCORE inside the
PCx pins go low in stop mode
On some rare parts, the maximum HSB and CPU speed is 50MHz instead of 66MHz.
AT32UC3A
78