ATxmega16A4U Atmel Corporation, ATxmega16A4U Datasheet - Page 257

• Manufacturer Part Number: ATxmega16A4U
• Manufacturer: Atmel Corporation

Specifications of ATxmega16A4U

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• 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): 3.3
• Eeprom (bytes): 1024
• 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

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
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