AT32UC3L064-AUTES ATMEL [ATMEL Corporation], AT32UC3L064-AUTES Datasheet - Page 69

• Manufacturer Part Number: AT32UC3L064-AUTES
• Manufacturer: ATMEL [ATMEL Corporation]

10.2.13
10.2.14
10.3
10.4
10.4.1
32099DS–06/2010
Rev. C
Rev. B
I/O Pins
Chip
Processor and Architecture
2. The aWire debug interface is reset after leaving Shutdown mode
1. PA17 has low ESD tolerance
1. Increased Power Consumption in VDDIO in sleep modes
2. In 3.3V Single Supply Mode the Analog Comparator inputs affects the device’s ability
Not sampled.
1. Privilege violation when using interrupts in application mode with protected system
2. Hardware breakpoints may corrupt MAC results
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.
PA17 only tolerates 500V ESD pulses (Human Body Model).
Fix/Workaround
Care must be taken during manufacturing and PCB design.
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.
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 1.0 V until the POR reset is
released.
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.
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