ATxmega64B3 Atmel Corporation, ATxmega64B3 Datasheet - Page 351

• Manufacturer Part Number: ATxmega64B3
• Manufacturer: Atmel Corporation

Specifications of ATxmega64B3

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Segment Lcd: 100
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Figure 26-1. Analog comparator overview.
26.3
26.3.1
26.3.2
26.4
26.5
8291A–AVR–10/11
Bandgap
Pin Input
Pin Input
Voltage
Scaler
Pin Input
Pin Input
Input Sources
Signal Compare
Interrupts and Events
Pin Inputs
Internal Inputs
Each analog comparator has one positive and one negative input. Each input may be chosen
from a selection of analog input pins and internal inputs such as a V
output from the analog comparator is one when the difference between the positive and the neg-
ative input voltage is positive, and zero otherwise.
Any of analog input pins on the port can be selected as input to the analog comparator.
Two internal inputs are available for the analog comparator:
In order to start a signal comparison, the analog comparator must be configured with the pre-
ferred properties and inputs before the module is enabled. The result of the comparison is
continuously updated and available for application software and the event system.
The analog comparator can be configured to generate interrupts when the output toggles, when
the output changes from zero to one (rising edge), or when the output changes from one to zero
• Bandgap reference voltage
• Voltage scaler, which provides a 64-level scaling of the internal V
ACnMUXCTRL
+
-
+
-
AC1
AC0
ACnCTRL
Enable
Enable
Hysteresis
Hysteresis
Interrupt
Mode
WINCTRL
Atmel AVR XMEGA B
CC
CC
Sensititivity
voltage scaler. The digital
Interrupt
Function
Window
Control
voltage
&
AC0OUT
AC1OUT
Interrupts
Events
351