AT32UC3L-EK Atmel, AT32UC3L-EK Datasheet - Page 641

• 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

27.6.5.3
27.6.6
32099F–11/2010
Filtering
Window Mode Peripheral Events
When operating in window mode, each channel can generate the same peripheral events as in
normal mode, see
Additionally, when channels operate in window mode, programming Window Mode Event Selec-
tion Source (CONFWn.WEVSRC) can cause peripheral events to be generated when:
The output of the comparator can be filtered to reduce noise. The filter length is determined by
the Filter Length field in the CONFn register (CONFn.FLEN). The filter samples the Analog
Comparator output at the GCLK frequency for 2
counts the number of cycles the AC output was one. This filter is deactivated if CONFn.FLEN
equals 0.
If the filter is enabled, the Hysteresis Value field HYS in the CONFn register (CONFn.HYS) can
be used to define a hysteresis value. The hysteresis value should be chosen so that:
The filter function is defined by:
The filtering algorithm is explained in
ber of measurements that are zero is less than (2
number of measurements that are one is more than (2
Otherwise, the result is unchanged.
• As soon as the common input voltage is inside the window.
• As soon as the common input voltage is outside the window.
• On toggle of the window compare output (ACWOUT)
• Whenever a comparison is ready and the common input voltage is inside the window.
• Whenever a comparison is ready and the common input voltage is outside the window.
• When the comparison in both channels in the window pair is ready.
⎛
⎝
Section
2
--------------- -
FLEN
2
+
27.6.4.3.
HYS
CNT
CNT
⎞
⎠
>
≥
CNT
<
⎛
⎝
Figure
⎛
⎝
2
--------------- -
2
--------------- - H
FLEN
FLEN
2
≥
2
2
--------------- -
⎛
⎝
FLEN
2
--------------- - H
2
27-3. 2
+
– YS
FLEN
2
HYS
>
CONFn.FLEN
HYS
– YS
FLEN
⎞
⎠
⎞
⎠
FLEN
⇒
⇒
/2 - HYS), the filtered result is zero. If the
comp
comp
⎞
⎠
FLEN
measurements are sampled. If the num-
⇒
AT32UC3L016/32/64
samples. A separate counter (CNT)
/2 + HYS), the filtered result is one.
comp unchanged
=
=
0
1
641