ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 238
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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20.5
8331A–AVR–07/11
Clock Generation
Figure 20-6. SRAM Memory Mapping
The USB module requires minimum 6MHz clock for low speed USB operation, and minimum
48MHz clock for full speed USB operation. It can be clocked from internal or external clock
sources by using the internal PLL, or directly from 32 MHz internal oscillator when this is tuned
and calibrated to 48 MHz. The CPU and Peripherals clocks must run at minimum 1.5 MHz for
low speed operation, and minimum 12MHz for full speed operation.
The USB module clock selection is independent and separate from the main System Clock
selection. Selection and setup is done using the main Clock control settings. For details, refer to
”System Clock and Clock Options” on page
The
(MAXEP+1)*16
Figure 20-7 on page 239
ADDRESS
SRAM
EPPTR +
EPPTR
FIFO
ENDPOINT
DESCRIPTORS
TABLE
FRAME
NUMBER
(MAXEP+1)<<4
shows an overview of the USB module clock selection.
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
EP_ADDRH_MAX
81.
EP_ADDRH_0
FRAMENUMH
EP_ADDRL_0
FRAMENUML
DATAPTRH
AUXDATAL
AUXDATAH
DATAPTRH
AUXDATAL
AUXDATAH
DATAPTRH
AUXDATAL
AUXDATAH
DATAPTRL
DATAPTRL
DATAPTRL
STATUS
STATUS
STATUS
CNTH
CNTH
CNTH
CTRL
CNTL
CTRL
CNTL
CTRL
CNTL
Atmel AVR XMEGA AU
ENDPOINT
ENDPOINT
ENDPOINT
MAXEP IN
0 OUT
0 IN
(MAXEP+1) x 4 Bytes
Active when FIFOEN==1
(MAXEP+1) x 16 Bytes
2 Bytes
Active when
STFRNUM==1
238
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