ATxmega128D4 Atmel Corporation, ATxmega128D4 Datasheet - Page 128
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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12.7
8210B–AVR–04/10
Capture Channel
Figure 12-7. Changing The Period without Buffering
When double buffering is used, the buffer can be written at any time, but the Period Register is
always updated on the “update” condition as shown in
and generation of odd waveforms.
Figure 12-8. Changing Period using Buffering
The CC channels can be used as capture channel to capture external events and give them a
time-stamp indicating time of occurrence. To use capture the Counter must be set in normal
operation.
Events are used to trigger the capture, i.e any events from the Event System including pin
change from any pin can trigger a capture operation. The Event Source Select setting, selects
the event channel that will trigger CC channel A, and the following event channels will then trig-
ger events on the following CC channels if configured. For instance setting the Event Source
Select to event channel 2 will result in CC channel A being connected to Event Channel 2, CC
channel B to event channel 3 and so on.
CNT
CNT
MAX
BOT
MAX
BOT
PERBUF that is higher
New Period written to
than current CNT
New TOP written to
PER that is higher
than current CNT
New Period written to
PERBUF that is lower
than current CNT
Counter Wraparound
New TOP written to
PER that is lower
than current CNT
Figure
12-8. This prevents wraparound
New PER is updated
with PERBUF value.
XMEGA D
"update"
"write"
"update"
"write"
128
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