ATxmega128A4U Atmel Corporation, ATxmega128A4U Datasheet - Page 140
ATxmega128A4U
Manufacturer Part Number
ATxmega128A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128A4U
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 Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
7
Twi (i2c)
2
Uart
5
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
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
5
Output Compare Channels
16
Input Capture Channels
16
Pwm Channels
16
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega128A4U-CU
Manufacturer:
ATMEL
Quantity:
1 000
Company:
Part Number:
ATxmega128A4U-MH
Manufacturer:
JAE
Quantity:
3 000
Part Number:
ATxmega128A4U-U
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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13.3
8331A–AVR–07/11
I/O Pin Use and Configuration
Figure 13-1 on page 140
controlling a pin.
Figure 13-1. General I/O pin functionality.
Each port has one data direction (DIR) register and one data output value (OUT) register that
are used for port pin control. The data input value (IN) register is used for reading the port pins.
In addition, each pin has a pin configuration (PINnCTRL) register for additional pin configuration.
Direction of the pin is decided by the DIRn bit in the DIR register. If DIRn is written to one, pin n
is configured as an output pin. If DIRn is written to zero, pin n is configured as an input pin.
When direction is set as output, the OUTn bit in OUT is used to set the value of the pin. If OUTn
is written to one, pin n is driven high. If OUTn is written to zero, pin n is driven low.
The IN register is used for reading pin values. A pin value can always be read regardless of
whether the pin is configured as input or output, except if digital input is disabled.
The I/O pins are tri-stated when a reset condition becomes active, even if no clocks are running.
shows the I/O pin functionality and the registers that are available for
Atmel AVR XMEGA AU
140
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