AT90USB647-MU Atmel, AT90USB647-MU Datasheet - Page 266
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AT90USB647-MU
Manufacturer Part Number
AT90USB647-MU
Description
MCU, 8BIT, 64K FLASH, USB, 64QFN
Manufacturer
Atmel
Specifications of AT90USB647-MU
Controller Family/series
AT90
No. Of I/o's
48
Eeprom Memory Size
2KB
Ram Memory Size
4KB
Cpu Speed
16MHz
No. Of
RoHS Compliant
Core Size
8bit
Program Memory Size
64KB
Oscillator Type
External, Internal
Package
64QFN EP
Device Core
AVR
Family Name
AT90
Maximum Speed
20 MHz
Ram Size
4 KB
Operating Supply Voltage
3.3|5 V
Data Bus Width
8 Bit
Program Memory Type
Flash
Number Of Programmable I/os
48
Interface Type
SPI/TWI/USART/USB
On-chip Adc
8-chx10-bit
Operating Temperature
-40 to 85 °C
Number Of Timers
4
Lead Free Status / Rohs Status
Details
Available stocks
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21.13 USB Software Operating modes
266
AT90USB64/128
Depending on the USB operating mode, the software should perform some the following
operations:
Power On the USB interface
Power Off the USB interface
Suspending the USB interface
Resuming the USB interface
• Power-On USB pads regulator
• Configure PLL interface
• Enable PLL and wait PLL lock
• Enable USB interface
• Configure USB interface (USB speed, Endpoints configuration...)
• Wait for USB VBUS information connection
• Attach USB device
• Detach USB interface
• Disable USB interface
• Disable PLL
• Disable USB pad regulator
• Clear Suspend Bit
• Freeze USB clock
• Disable PLL
• Be sure to have interrupts enable to exit sleep mode
• Make the MCU enter sleep mode
• Enable PLL
• Wait PLL lock
• Unfreeze USB clock
• Clear Resume information
7593K–AVR–11/09
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