ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 156
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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14.7
8077H–AVR–12/09
Capture Channel
Figure 14-7. 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 14-8. 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
14-8. This prevents wraparound
New PER is updated
with PERBUF value.
XMEGA A
"update"
"write"
"update"
"write"
156
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