ATxmega64B3 Atmel Corporation, ATxmega64B3 Datasheet - Page 233

• Manufacturer Part Number: ATxmega64B3
• Manufacturer: Atmel Corporation

Specifications of ATxmega64B3

• Flash (kbytes): 64 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: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Segment Lcd: 100
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• 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: 2
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

18.14.4
18.14.5
18.14.6
8291A–AVR–10/11
CNTH – Counter High
DATAPTRL – Data Pointer Low
DATAPTRH – Data Pointer High
• Bit 7:0 – CNT[7:0]: Endpoint Byte Counter
This byte contains the eight lsbs of the USB endpoint counter (CNT).
• Bit 6 – AZLP: Automatic Zero Length Packet
When this bit is set, the USB module will manage the ZLP handshake by hardware. This
applies to IN endpoints only. When this bit is zero, the ZLP handshake must be managed by
firmware.
• Bit 6:2 – 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 1:0 – CNT[9:8]: Endpoint Byte Counter
These bits contain the two msbs of the USB endpoint counter (CNT).
The DATAPTRL and DATAPTRH registers represent the 16-bit value, DATAPTR, that contains
the SRAM address to the endpoint data buffer.
• Bit 7:0 – DATAPTR[7:0]: Endpoint Dta Pointer Low
This byte contains the eight lsbs of the endpoint data pointer (DATAPTR).
Bit
+0x04
Read/Write
Initial Value
Bit
+0x05
Read/Write
Initial Value
Bit
+0x03
Read/Write
Initial Value
Bit
+0x02
Read/Write
Initial Value
R/W
R/W
AZLP
R/W
R/W
7
X
7
X
X
X
7
7
R/W
R/W
R/W
X
X
6
6
6
X
R
X
6
–
R/W
R/W
R/W
X
X
5
5
X
5
5
–
R
X
R/W
R/W
R/W
4
X
4
X
DATAPTR[15:8]
DATAPTR[7:0]
X
R
4
4
–
X
CNT[7:0]
R/W
R/W
R/W
3
X
3
X
3
X
R
X
3
–
Atmel AVR XMEGA B
R/W
R/W
R/W
X
X
2
2
2
X
R
X
2
–
R/W
R/W
R/W
R/W
X
X
1
1
X
1
1
X
CNT[9:8]
R/W
R/W
R/W
R/W
0
X
0
X
X
0
0
X
DATAPTRL
DATAPTRH
CNTL
CNTH
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