ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 307
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
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23.15.3
23.15.4
8331A–AVR–07/11
CTRLA – Control Register A
CTRLB – USART Control Register B
• Bit 7:6 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
• Bit 5:4 – RXCINTLVL[1:0]: Receive Complete Interrupt Level
These bits enable the receive complete interrupt and select the interrupt level, as described in
”Interrupts and Programmable Multilevel Interrupt Controller” on page
will be triggered when the RXCIF flag in the STATUS register is set.
• Bit 3:2 – TXCINTLVL[1:0]: Transmit Complete Interrupt Level
These bits enable the transmit complete interrupt and select the interrupt level, as described in
”Interrupts and Programmable Multilevel Interrupt Controller” on page
will be triggered when the TXCIF flag in the STATUS register is set.
• Bit 1:0 – DREINTLVL[1:0]: Data Register Empty Interrupt Level
These bits enable the data register empty interrupt and select the interrupt level, as described in
”Interrupts and Programmable Multilevel Interrupt Controller” on page
will be triggered when the DREIF flag in the STATUS register is set.
• Bit 7:5 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
• Bit 4 – RXEN: Receiver Enable
Setting this bit enables the USART receiver. The receiver will override normal port operation for
the RxD pin, when enabled. Disabling the receiver will flush the receive buffer, invalidating the
FERR, BUFOVF, and PERR flags.
• Bit 3 – TXEN: Transmitter Enable
Setting this bit enables the USART transmitter. The transmitter will override normal port opera-
tion for the TxD pin, when enabled. Disabling the transmitter (writing TXEN to zero) will not
become effective until ongoing and pending transmissions are completed; i.e., when the transmit
Bit
+0x03
Read/Write
Initial Value
Bit
+0x04
Read/Write
Initial Value
R
R
7
–
0
7
–
0
R
R
6
–
0
6
–
0
R/W
R
5
RXCINTLVL[1:0]
0
5
–
0
RXEN
R/W
R/W
4
0
4
0
TXEN
R/W
R/W
Atmel AVR XMEGA AU
3
TXCINTLVL[1:0]
0
3
0
CLK2X
R/W
R/W
2
0
2
0
132. The enabled interrupt
132. The enabled interrupt
132. The enabled interrupt
MPCM
R/W
R/W
1
DREINTLVL[1:0]
0
1
0
TXB8
R/W
R/W
0
0
0
0
CTRLA
CTRLB
307
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