ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 302
ATxmega64A4U
Manufacturer Part Number
ATxmega64A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A4U
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 Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
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)
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
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:
ATxmega64A4U-AU
Manufacturer:
ON
Quantity:
29 000
Company:
Part Number:
ATxmega64A4U-U
Manufacturer:
ATMEL
Quantity:
74
- Current page: 302 of 505
- Download datasheet (8Mb)
Figure 23-9. Fractional baud rate example.
23.10 USART in Master SPI Mode
23.11 USART SPI vs. SPI
8331A–AVR–07/11
baud clock
baud clock
Fractional
counter
counter
clk
Baud
Baud
Ideal
clk
PER
PER
Using the USART in master SPI mode requires the transmitter to be enabled. The receiver can
optionally be enabled to serve as the serial input. The XCK pin will be used as the transfer clock.
As for the USART, a data transfer is initiated by writing to the DATA register. This is the case for
both sending and receiving data, since the transmitter controls the transfer clock. The data writ-
ten to DATA are moved from the transmit buffer to the shift register when the shift register is
ready to send a new frame.
The transmitter and receiver interrupt flags and corresponding USART interrupts used in mas-
terSPI mode are identical in function to their use in normal USART operation. The receiver error
status flags are not in use and are always read as zero.
Disabling of the USART transmitter or receiver in master SPI mode is identical to their disabling
in normal USART operation.
The USART in master SPI mode is fully compatible with the standalone SPI module in that:
When the USART is set in master SPI mode, configuration and use are in some cases different
from those of the standalone SPI module. In addition, the following differences exist:
• Timing diagrams are the same
• UCPHA bit functionality is identical to that of the SPI CPHA bit
• UDORD bit functionality is identical to that of the SPI DORD bit
• The USART transmitter in master SPI mode includes buffering, but the SPI module has no
• The USART receiver in master SPI mode includes an additional buffer level
• The USART in master SPI mode does not include the SPI (Write Collision) feature
• The USART in master SPI mode does not include the SPI double speed mode feature, but
transmit buffer
this can be achieved by configuring the baud rate generator accordingly
Atmel AVR XMEGA AU
302
Related parts for ATxmega64A4U
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: