ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 774
ATUC128L4U
Manufacturer Part Number
ATUC128L4U
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(159 pages)
3.ATUC128L4U.pdf
(960 pages)
4.ATUC128L4U.pdf
(92 pages)
Specifications of ATUC128L4U
Flash (kbytes)
128 Kbytes
Pin Count
48
Max. Operating Frequency
50 MHz
Cpu
32-bit AVR
# Of Touch Channels
17
Hardware Qtouch Acquisition
Yes
Max I/o Pins
36
Ext Interrupts
36
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
2
Uart
4
Lin
4
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
12
Adc Speed (ksps)
460
Analog Comparators
8
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
16
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.62 to 3.6
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
6
Output Compare Channels
18
Input Capture Channels
12
Pwm Channels
35
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATUC128L4U-U
Manufacturer:
ATMEL
Quantity:
3 006
- AT32UC3A0128 PDF datasheet
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31.5.6
31.5.7
31.6
31.6.1
32142A–12/2011
Functional Description
Analog Comparators
Debug Operation
Acquisition Types
(MBLEN) when using the QMatrix acquisition method. Two additional handshakes support DMA-
Touch by regulating transfers from memory to the DMATouch State Write Register (DMATSW)
and from the DMATouch State Read Register (DMATSR) to memory. The Peripheral DMA Con-
troller must be configured properly and enabled in order to perform direct memory access
transfers to/from the CAT module.
When the CAT module is performing QMatrix acquisition, it requires that on-chip analog compar-
ators be used as part of the process. These analog comparators are not controlled directly by
the CAT module, but by a separate Analog Comparator (AC) Interface. This interface must be
configured properly and enabled before the CAT module is used. This includes configuring the
generic clock input for the analog comparators to the proper sampling frequency.
The CAT will automatically use the negative peripheral events from the AC Interface on every Y
pin in QMatrix mode. When QMatrix acquisition is used the analog comparator corresponding to
the selected Y pins must be enabled and converting continuously, using the Y pin as the positive
reference and the ACREFN as negative reference.
When an external debugger forces the CPU into debug mode, the CAT continues normal opera-
tion. If the CAT is configured in a way that requires it to be periodically serviced by the CPU
through interrupts or similar, improper operation or data loss may result during debugging.
The CAT module can perform several types of QTouch acquisition from capacitive touch sen-
sors: autonomous QTouch (one sensor only), DMATouch, QTouch group A, and QTouch group
B. The CAT module can also perform QMatrix acquisition. Each type of acquisition has an asso-
ciated set of pin selection and configuration registers that allow a large degree of flexibility.
The following schematic diagrams show typical hardware connections for QTouch and QMatrix
sensors, respectively:
Figure 31-2. CAT Touch Connections
AVR32 Chip
SNSKn
SNSn
Cs (Sense Capacitor)
ATUC64/128/256L3/4U
QTouch
Sensor
774
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