ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 317
ATxmega64A1
Manufacturer Part Number
ATxmega64A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A1
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
78
Ext Interrupts
78
Usb Speed
No
Usb Interface
No
Spi
12
Twi (i2c)
4
Uart
8
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
4
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
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
8
Output Compare Channels
24
Input Capture Channels
24
Pwm Channels
24
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A1-AU
Manufacturer:
Atmel
Quantity:
135
Company:
Part Number:
ATxmega64A1U-AU
Manufacturer:
ATMEL
Quantity:
953
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26. DAC - Digital to Analog Converter
26.1
26.2
8077H–AVR–12/09
Features
Overview
•
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The DAC converts digital values to analog voltages. The DAC has 12-bit resolution and is capa-
ble of converting 1 million samples per second. The output from the DAC can either be
continuous to one pin, or fed to two different pins using a sample and hold (S/H) circuitry. A sep-
arate low power mode is available, and the DAC can be gain and offset calibrated.
The output signal swing is defined by the reference voltage (VREF). The following sources are
available as VREF in the DAC:
The output voltage from a DAC channel is given as:
Figure 26-1 on page 318
ity is shown.
V
• AV
• Internal 1.00V
• External reference applied to the AREF pin on PORTA or PORTB
12-bit resolution
Up to 1 Msps conversion rate
Flexible conversion range
Multiple trigger sources
1 continuous time or 2 Sample/Hold (S/H) outputs
Built-in offset and gain calibration
High drive capabilities
Internal/External reference
Possibility to use as input to analog comparator or ADC
Power reduction mode
DACx
CC
=
CHnDATA
--------------------------- - VREF
0xFFF
⋅
illustrates the basic functionality related to the DAC. Not all functional-
XMEGA A
317
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