ATxmega64B3 Atmel Corporation, ATxmega64B3 Datasheet - Page 42

• 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

XMEGA B3
the configuration of these. The USB module has built-in direct memory access (DMA), and will
read/write data from/to the SRAM when a USB transaction takes place.
To maximize throughput, an endpoint address can be configured for ping-pong operation. When
done, the input and output endpoints are both used in the same direction. The CPU or DMA con-
troller can then read/write one data buffer while the USB module writes/reads the others, and
vice versa. This gives double buffered communication.
Multipacket transfer enables a data payload exceeding the maximum packet size of an endpoint
to be transferred as multiple packets without software intervention. This reduces the CPU inter-
vention and the interrupts needed for USB transfers.
For low-power operation, the USB module can put the microcontroller into any sleep mode when
the USB bus is idle and a suspend condition is given. Upon bus resumes, the USB module can
wake up the microcontroller from any sleep mode.
PORTD has one USB. Notation of this is USB.
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