ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 289
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
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Part Number
Manufacturer
Quantity
Price
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Part Number:
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Manufacturer:
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25. ADC - Analog to Digital Converter
25.1
25.2
8077H–AVR–12/09
Features
Overview
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The ADC converts analog voltages to digital values. The ADC has 12-bit resolution and is capa-
ble of converting up to 2 million samples per second. The input selection is flexible, and both
single-ended and differential measurements can be done. For differential measurements an
optional gain stage is available to increase the dynamic range. In addition several internal signal
inputs are available. The ADC can provide both signed and unsigned results.
This is a pipeline ADC. A pipeline ADC consists of several consecutive stages, where each
stage convert one part of the result. The pipeline design enables high sample rate at low clock
speeds, and remove dependencies between sample speed and propagation delay. This also
means that a new analog voltage can be sampled and a new ADC measurement started while
other ADC measurements are ongoing.
ADC measurements can either be started by application software or an incoming event from
another peripheral in the device. Four different result registers with individual input selection
(MUX selection) are provided to make it easier for the application to keep track of the data. Each
result register and MUX selection pair is referred to as an ADC Channel. It is possible to use
DMA to move ADC results directly to memory or peripherals when conversions are done.
Both internal and external analog reference voltages can be used. A very accurate internal
1.00V reference is available.
12-bit resolution
Up to 2 Msps sample and conversion rate
Single-ended or Differential measurements
Signed and Unsigned mode
4 result registers with individual input control
8 - 16 single-ended inputs
8x4 differential inputs without gain
8x4 differential input with gain
4 internal inputs
1x, 2x, 4x, 8x, 16x, 32x or 64x software selectable gain
4 inputs can be sampled within 1.5 µs
8-, or 12-bit selectable resolution
Minimum single result propagation delay of 2.5 µs (8-bit resolution)
Minimum single result propagation delay of 3.5 µs (12-bit resolution)
Built-in reference
Optional external reference
Optional event triggered conversion for accurate timing
Optional DMA transfer of conversion results
Optional interrupt/event on compare result
– Temperature Sensor
– DAC Output
– VCC voltage divided by 10
– Bandgap voltage
XMEGA A
289
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