AT90USB646-MUR Atmel, AT90USB646-MUR Datasheet - Page 423

• Manufacturer Part Number: AT90USB646-MUR
• Description: MCU AVR 64K FLASH 16MHZ 64QFN
• Manufacturer: Atmel
• Series: AVR® 90USBr

Specifications of AT90USB646-MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 48
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

31.13 Watchdog Timer Frequency
7593K–AVR–11/09
4.48
4.46
4.44
4.42
4.38
4.36
4.34
3.56
3.54
3.52
3.48
3.46
3.44
3.42
4.5
4.4
3.5
-40
-40
-30
-30
Figure 31-22. BOD Voltage (4.3V level) vs. Temperature
Figure 31-23. WDT Oscillator Frequency vs. Vcc
-20
-20
-10
-10
0
0
10
10
Te mpe ra ture (C
Te mpe ra ture (C
20
20
30
30
40
40
50
50
60
60
70
70
AT90USB64/128
80
80
Rising Vcc
Falling Vcc
Rising Vcc
Falling Vcc
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