ATxmega128D4 Atmel Corporation, ATxmega128D4 Datasheet - Page 233
ATxmega128D4
Manufacturer Part Number
ATxmega128D4
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128D4
Flash (kbytes)
128 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Speed
No
Usb Interface
No
Spi
4
Twi (i2c)
2
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
200
Analog Comparators
2
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
8
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
4
Output Compare Channels
14
Input Capture Channels
14
Pwm Channels
14
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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20.9
8210B–AVR–04/10
ADC Input Model
Figure 20-15. ADC timing for one single conversion with 8x or 16x gain
Figure 20-16. ADC timing for one single conversion with 32x or 64x gain
An analog voltage input must be able to fully charge the sample and hold (S/H) capacitor in the
ADC in order to achieve maximum accuracy. Seen externally the ADC input consists of a input
channel (R
page 233
Figure 20-17. ADC input for single ended measurements
GAINSTAGE AMPLIFY
GAINSTAGE SAMPLE
GAINSTAGE AMPLIFY
Positive
GAINSTAGE SAMPLE
input
CONVERTING BIT
CONVERTING BIT
ADC SAMPLE
ADC SAMPLE
and
CLK
START
CLK
START
channel
ADC
ADC
IF
IF
Figure 20-18 on page 234
) and the switch (R
1
1
2
2
R
3
channel
3
MSB
switch
4
shows the input models for the ADC inputs.
10
) resistance, and the S/H capacitor.
MSB
4
9
10
5
8
9
5
8
7
R
6
switch
7
6
6
6
5
7
5
4
7
4
3
8
3
2
2
8
C
9
1
Sample
XMEGA D
1
Figure 20-17 on
LSB
LSB
9
10
VCC/2
10
11
233
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