ATxmega64D4 Atmel Corporation, ATxmega64D4 Datasheet - Page 105
ATxmega64D4
Manufacturer Part Number
ATxmega64D4
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64D4
Flash (kbytes)
64 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)
4
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATxmega64D4-AU
Manufacturer:
AT
Quantity:
20 000
Company:
Part Number:
ATxmega64D4-H
Manufacturer:
ATMEL
Quantity:
5
Company:
Part Number:
ATxmega64D4-U
Manufacturer:
ATMEL
Quantity:
86
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11.4.5
11.4.6
11.5
8210B–AVR–04/10
Reading the Pin value
Wired-OR
Wired-AND
Figure 11-6. Output configuration - Wired-OR with optional pull-down.
Figure 11-7. Output configuration - Wired-AND with optional pull-up.
Independent of the pin data direction, the pin value can be read from the IN register as shown in
Figure 11-1 on page
register bit and the preceding flip-flop constitute a synchronizer. The synchronizer is needed to
avoid metastability if the physical pin changes value near the edge of the internal clock. The
Synchronizer introduces a delay on the internal signal line.
timing diagram of the synchronization when reading an externally applied pin value. The maxi-
mum and minimum propagation delays are denoted t
102. If the digital input is disabled, the pin value cannot be read. The IN
OUTn
OUTn
INn
INn
pd,max
and t
Figure 11-8 on page 106
pd,min
respectively.
Pn
Pn
XMEGA D
shows a
105
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