AT32UC3L-EK Atmel, AT32UC3L-EK Datasheet - Page 279

• Manufacturer Part Number: AT32UC3L-EK
• Description: KIT EVAL AVR32 UC3 MCU
• Manufacturer: Atmel
• Type: MCUr

Specifications of AT32UC3L-EK

• Contents: *
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: UC3L
• Kit Contents: Board
• Features: USB / Battery Powered, Board Controller / Bootloader
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Tool Type: Starter Kit
• Cpu Core: AVR 8
• Data Bus Width: 8 bit
• Processor Series: AT32
• Processor To Be Evaluated: AT32UC3L064
• Interface Type: USB, Capacitive Touch
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 15-2. Basic Mode WDT Timing Diagram, normal operation.
Figure 15-3. Basic Mode WDT Timing Diagram, no clear within T
15.5.1.6
15.5.2
32099F–11/2010
C L R .W D T C L R
W a tc h d o g re s e t
t= t
C L R .W D T C L R
W a tch d o g re se t
W rite o n e to
t= t
W rite o ne to
0
0
Window Mode
Watchdog Reset
If the WDT counter is not cleared within T
see
A watchdog reset will result in a reset and the code will start executing from the boot vector,
please refer to the Power Manager chapter for details. If the Disable After Reset (DAR) bit in the
CTRL Register is zero, the WDT counter will restart counting from zero when the watchdog reset
is released.
If the CTRL.DAR bit is one the WDT will be disabled after a watchdog reset. Only the CTRL.EN
bit will be changed after the watchdog reset. However, if WDTAUTO fuse is configured to enable
the WDT after a watchdog reset, and the CTRL.FCD bit is zero, writing a one to the CTRL.DAR
bit will have no effect.
The window mode can protect against tight loops of runaway code. This is obtained by adding a
ban period to timeout period. During the ban period clearing the WDT counter is not allowed.
If the WDT Mode (MODE) bit in the CTRL Register is one, the WDT is in window mode. Note
that the CTRL.MODE bit can only be changed when the WDT is disabled (CTRL.EN=0).
Figure 15-3 on page
T
T
p s e l
p se l
279.
psel
psel
.
a watchdog reset will be issued at the end of T
AT32UC3L016/32/64
T im e o u t
T im e o u t
279
psel
,