AT32UC3L0256 Atmel Corporation, AT32UC3L0256 Datasheet - Page 679

• 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

28.7.4
Name:
Access Type:
Offset:
Reset Value:
• DIV: Clock Divider
• CHLEN: Charge Length
• SELEN: Settle Length
32145A–12/2011
31
23
15
7
The prescaler is used to ensure that the CLK_CAT clock is divided to around 1 MHz to produce the sampling clock.The
prescaler uses the following formula to generate the sampling clock:
Sampling clock = CLK_CAT / (2(DIV+1))
For the autonomous QTouch sensor and DMATouch sensors, specifies how many sample clock cycles should be used for
transferring charge to the sense capacitor.
For the autonomous QTouch sensor and DMATouch sensors, specifies how many sample clock cycles should be used for
settling after charge transfer.
Autonomous/DMA Touch Configuration Register 0
30
22
14
6
ATCFG0
Read/Write
0x10
0x00000000
29
21
13
5
28
20
12
4
DIV[15:8]
DIV[7:0]
CHLEN
SELEN
27
19
11
3
26
18
10
2
AT32UC3L0128/256
25
17
9
1
24
16
8
0
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