AT32UC3L0256 Atmel Corporation, AT32UC3L0256 Datasheet - Page 668

• Manufacturer Part Number: AT32UC3L0256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3L0256

• Flash (kbytes): 256 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 Speed: No
• Usb Interface: No
• Spi: 5
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• 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

32145A–12/2011
Figure 28-3. CAT Matrix Connections
In order to use the autonomous QTouch detection capability, the user must first set up the
Autonomous Touch Pin Select Register (ATPINS) and Autonomous/DMA Touch Configuration
Registers (ATCFG0 through 3) with appropriate values. The module can then be enabled using
the Control Register (CTRL). After the module is enabled, the module will acquire data from the
autonomous QTouch sensor and use it to determine whether the sensor is activated. The
active/inactive status of the autonomous QTouch sensor is reported in the Status Register (SR),
and it is also possible to configure the CAT to generate an interrupt whenever the status
changes. The module will continue acquiring autonomous QTouch sensor data and updating
autonomous QTouch status until the module is disabled or reset.
In order to use the DMATouch capability, it is first necessary to set up the pin mode registers
(PINMODE0, PINMODE1, and PINMODE2) so that the desired pins are specified as DMA-
Touch. The Autonomous/DMA Touch Configuration Registers (ATCFG0 through 3) must also be
configured with appropriate values. One channel of the Peripheral DMA Controller must be set
up to transfer state words from a block of memory to the DMATSW register, and another chan-
nel must be set up to transfer state words from the DMATSR register back to the same block of
memory. The module can then be enabled using the CTRL register. After the module is enabled,
the module will acquire count values from each DMATouch sensor. Once the module has
acquired a count value for a sensor, it will use a handshake interface to signal the Peripheral
DMA controller to transfer a state word to the DMATSW register. The module will use the count
value to update the state word, and then the updated state word will be transferred to the
DMATSR register. Another handshake interface will signal the Peripheral DMA controller to
transfer the contents of the DMATSR register back to memory. The status of the DMATouch
sensors can be determined at any time by reading the DMATouch Sensor Status Register
(DMATSS).
AVR32 Chip
ACREFN
VDIVEN
SMP
YK0
YK1
DIS
X2
X3
X6
X7
Y0
Y1
Rdis
Cs1 (Sense Capacitor)
Rsmp1
Cs0 (Sense Capacitor)
Ra
Rb
NOTE: If the CAT internal
current sources will be enabled,
the SMP signal and Rsmp
resistors should NOT be included
in the design. If the CAT internal
current sources will NOT be
enabled, the DIS signal and Rdis
resistor should NOT be included
in the design.
QMatrix Sensor Array
AT32UC3L0128/256
Rsmp0
668