AT90USB647 Atmel Corporation, AT90USB647 Datasheet - Page 25

• Manufacturer Part Number: AT90USB647
• Manufacturer: Atmel Corporation

Specifications of AT90USB647

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 48
• Ext Interrupts: 16
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device + OTG
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 10
• Input Capture Channels: 1
• Pwm Channels: 9
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

7. Errata
8. AT90USB1287/6 Errata.
8.1
8.2
7593KS–AVR–11/09
Second Release
Third Release
First Release
Release
Silicon
AT90USB1287/6
AT90USB1287/6 First Release
Date Code from 0709 to 0801
except lots 0801 7H5103*
Lots 0801 7H5103* and
Note ‘*’ means a blank or any alphanumeric string
9.
8.
7.
Date Code up to 0648
Date Code from 0814
• Incorrect CPU behavior for VBUSTI and IDTI interrupts routines
• USB Eye Diagram violation in low-speed mode
• Transient perturbation in USB suspend mode generates over consumption
• VBUS Session valid threshold voltage
• USB signal rate
• VBUS residual level
• Spike on TWI pins when TWI is enabled
• High current consumption in sleep mode
• Async timer interrupt wake up from sleep generate multiple interrupts
90USB1286-16MU
The CPU core may incorrectly execute the interrupt vector related to the VBUSTI and IDTI
interrupt flags.
Problem fix/workaround
Do not enable these interrupts, firmware must process these USB events by polling VBUSTI
and IDTI flags.
The low to high transition of D- violates the USB eye diagram specification when transmitting
with low-speed signaling.
Problem fix/workaround
None.
In device mode and when the USB is suspended, transient perturbation received on the
USB lines generates a wake up state. However the idle state following the perturbation does
Incorrect CPU behavior for VBUSTI and IDTI interrupts routines
USB Eye Diagram violation in low-speed mode
Transient perturbation in USB suspend mode generates overconsumption
Errata History
from Date Code 0722 to 0806
except lots 0735 6H2726*
and lots 0735 6H2726*
Date Code up to 0714
Date Code from 0814
90USB1287-16AU
AT90USB64/128
Date Code from 0714 to 0810
except lots 0748 7H5103*
Lots 0748 7H5103* and
Date Code up to 0701
Date Code from 0814
90USB1287-16MU
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