ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 257
ATxmega256A3U
Manufacturer Part Number
ATxmega256A3U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega256A3U
Flash (kbytes)
256 Kbytes
Pin Count
64
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
50
Ext Interrupts
50
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
10
Twi (i2c)
2
Uart
7
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
16
Eeprom (bytes)
4096
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
7
Output Compare Channels
22
Input Capture Channels
22
Pwm Channels
22
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega256A3U-AU
Manufacturer:
TI
Quantity:
12 000
Part Number:
ATxmega256A3U-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATxmega256A3U-MH
Manufacturer:
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1 450
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20.15 Register Description - Frame
20.15.1
20.15.2
8331A–AVR–07/11
FRAMENUML – Frame Number Low Byte
FRAMENUMH – Frame Number High Byte
The FRAMENUML and FRAMENUMH registers represent the 10-bit value FRAMENUM that
holds the frame number from the most recently received Start Of Frame packet.
• Bit 7:0 – FRAMENUM[7:0]: Frame Number
This byte contains the 8 LSB of the Frame Number (FRAMENUM).
• Bit 7 – FRAMEERR: Frame Error
This flag is set if a CRC or bit-stuffing error was detected in the most recently received Start Of
Frame packet.
• Bit 6:3 – 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 2:0 – FRAMENUM[10:8]: Frame Number
This byte contains the 3 MSB of the Frame Number (FRAMENUM).
Bit
+0x01
Read/Write
Initial Value
Bit
+0x00
Read/Write
Initial Value
FRAMEERR
7
R
0
R
7
0
R
R
6
0
6
–
0
R
R
5
0
5
–
0
FRAMENUM[7:0]
R
R
4
0
4
–
0
R
R
3
0
3
–
0
Atmel AVR XMEGA AU
R
R
2
0
2
0
FRAMENUM[10:8]
R
R
1
0
1
0
R
R
0
0
0
0
FRAMENUMH
FRAMENUML
257
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