AT32UC3L064_11 ATMEL [ATMEL Corporation], AT32UC3L064_11 Datasheet - Page 104

• Manufacturer Part Number: AT32UC3L064_11
• Description: 32-bit Atmel AVR Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

10.4.23
32099HS–12/2011
I/O Pins
1. PB10 is not 3.3V tolerant.
2. Analog multiplexing consumes extra power
3. PA02, PB01, PB04, PB05, and RESET_N have half of the pull-up strength
4. JTAG is enabled at power up
5. MCKO and MDO[3] are swapped in the AUX1 mapping
Solution 1: Disable OSC0 by writing a zero to the Oscillator Enable bit in the System Control
Interface (SCIF) Oscillator Control Register (SCIF.OSC0CTRL.OSCEN) before going to a
sleep mode where OSC0 is disabled.
Solution 2: Pull down or up XIN0 and XOUT0 with 1MOhm resistor.
PB10 should be grounded on the PCB and left unused.
Fix/Workaround
None.
Current consumption on VDDIO increases when the voltage on analog inputs is close to
VDDIO/2.
Fix/Workaround
None.
Pins PA02, PB01, PB04, PB05, and RESET_N have half of the specified pull-up strength.
Fix/Workaround
None.
The JTAG function on pins PA00, PA01, PA02, and PA03, are enabled after startup. Normal
I/O module functionality is not possible on these pins.
Fix/Workaround
Add a 10kOhm pullup on the reset line.
When using the OCD AUX1 mapping of trace signals MDO[3] is located on pin PB05 and
MCKO is located on PB01.
Fix/Workaround
Swap pins PB01 and PB05 if using OCD AUX1.
AT32UC3L016/32/64
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