ATxmega256A3 Atmel Corporation, ATxmega256A3 Datasheet - Page 137

• Manufacturer Part Number: ATxmega256A3
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3

• Flash (kbytes): 256 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: 50
• Ext Interrupts: 50
• Usb Speed: No
• Usb Interface: No
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

13.10 Slew-rate Control
13.11 Clock and Event Output
8077H–AVR–12/09
Figure 13-10. Port override signals and related logic
Slew-rate control can be enabled for all I/O pins individually. Enabling the slew rate limiter will
typically increase the rise/fall time by 50-150% depending on voltage, temperature and load. For
information about the characteristics of the slew-rate limiter, please refer to the device data
sheet.
It is possible to output both the Peripheral Clock and the signaling event from Event Channel 0
to pin. Output port pin is selected from software. If an event occur on Event Channel 0, this will
PINnCTRL
D
D
D
Q
OUTn
DIRn
INn
R
R
R
R
Synchronizer
Analog Input/Output
Q
Q
Q
D
Digital Input Pin
Q
OUT Override Value
OUT Override Enable
R
DIR Override Value
DIR Override Enable
D
Pull Enable
Pull Keep
Pull Direction
Digital Input Disable (DID)
Wired AND/OR
Slew Rate Limit
Inverted I/O
DID Override Value
DID Override Enable
XMEGA A
Pxn
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