AT32UC3L064_2 Datasheet, PDF (804/830 Pages) ATMEL Corporation – 32-bit AVR® Microcontroller

AT32UC3L016/32/64
35.2.13 I/O Pins
35.2.14 Chip
2. The aWire debug interface is reset after leaving Shutdown mode
If the aWire debug mode is used as debug interface and the program enters Shutdown
mode, the aWire interface will be reset when the device receives a wakeup either from the
WAKE_N pin or the AST.
Fix/Workaround
None.
1. PA17 has low ESD tolerance
PA17 only tolerates 500V ESD pulses (Human Body Model).
Fix/Workaround
Care must be taken during manufacturing and PCB design.
1. Increased Power Consumption in VDDIO in sleep modes
If the OSC0 is enabled in crystal mode when entering a sleep mode where the OSC0 is dis-
abled, this will lead to an increased power consumption in VDDIO.
Fix/Workaround
Solution 1: Disable the OSC0 bt writing a zero to the Oscillator Enable bit in the System
Control Interface (SCIF) Oscillator Control Register (SCIF.OSC0CTRL.OSCEN) before
going to any sleep mode where the OSC0 is disabled
Solution 2: Pull down or up XIN0 and XOUT0 with 1Mohm resistor.
2. In 3.3V Single Supply Mode the Analog Comparator inputs affects the device’s ability
to start
When using the 3.3V Single Supply Mode the state of the Analog Comparator input pins can
affect the device’s ability to release POR reset.
This is due to an interaction between the Analog Comparator input pins and the POR cir-
cuitry. The issue is not present in the 1.8V Single Supply Mode or the 3.3V Supply mode
with 1.8V Regulated I/O Lines.
Fix/Workaround:
ACREFN (pin PA16) must be connected to GND until the POR reset is released and the
Analog Comparator inputs should not be driven higher than 1.0V until the POR reset is
released.
35.3 Rev. C
Not sampled.
35.4 Rev. B
35.4.1
Processor and Architecture
1. Privilege violation when using interrupts in application mode with protected system
stack
If the system stack is protected by the MPU and an interrupt occurs in application mode, an
MPU DTLB exception will occur.
Fix/Workaround
Make a DTLB Protection (Write) exception handler which permits the interrupt request to be
handled in privileged mode.
2. Hardware breakpoints may corrupt MAC results
32099D–06/2010
804