AT32UC3L-EK Atmel, AT32UC3L-EK Datasheet - Page 666
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AT32UC3L-EK
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT32UC3L-EK
Manufacturer:
Atmel
Quantity:
135
- Current page: 666 of 858
- Download datasheet (13Mb)
28.6.6
32099F–11/2010
Spread Spectrum Sensor Drive
Figure 28-4. CAT Acquisition and Processing Sequence
To reduce electromagnetic compatibility issues, the capacitive sensors can be driven with a
spread spectrum signal. To enable spread spectrum drive for a specific acquisition type, the
user must write a one to the SPREAD bit in the appropriate Configuration Register 1 (MGCFG1,
ATCFG1, TGACFG1, or TGBCFG1).
During spread spectrum operation, the length of each pulse within a burst is varied in a deter-
ministic pattern, so that the exact same burst pattern is used for a specific burst length. The
maximum spread is determined by the MAXDEV field in the Spread Spectrum Configuration
Register (SSCFG) register. The prescaler divisor is varied in a sawtooth pattern from
(2(DIV+1))-MAXDEV to (2(DIV+1))+MAXDEV and then back to (2(DIV+1))-MAXDEV. For exam-
ple, if DIV is 2 and MAXDEV is 3, the prescaler divisor will have the following sequence: 6, 7, 8,
No
touch detection
Autonomous touch
enabled (ATEN)?
autonomous
autonomous
touch count
Yes
algorithm
Acquire
Update
No
Idle
AISR written flag set?
Yes
AT32UC3L016/32/64
to be transferred
acquired counts
Acquire counts
Clear AISR
written flag
Wait for all
666
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