AT90USB647-MU Atmel, AT90USB647-MU Datasheet - Page 327

• 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

7593K–AVR–11/09
(ADIF in ADCSRA is set). The internal voltage reference options may not be used if an external
reference voltage is being applied to the AREF pin.
Table 25-3.
• Bit 5 – ADLAR: ADC Left Adjust Result
The ADLAR bit affects the presentation of the ADC conversion result in the ADC Data Register.
Write one to ADLAR to left adjust the result. Otherwise, the result is right adjusted. Changing the
ADLAR bit will affect the ADC Data Register immediately, regardless of any ongoing conver-
sions. For a complete description of this bit, see
page
• Bits 4:0 – MUX4:0: Analog Channel Selection Bits
The value of these bits selects which combination of analog inputs are connected to the ADC.
These bits also select the gain for the differential channels. See
bits are changed during a conversion, the change will not go in effect until this conversion is
complete (ADIF in ADCSRA is set).
Table 25-4.
MUX4..0
00000
00001
00010
00011
00100
00101
00110
00111
REFS1
0
0
1
1
329.
REFS0
Single Ended
Input
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
0
1
0
1
Voltage Reference Selections for ADC
Input Channel and Gain Selections
Voltage Reference Selection
AREF, Internal Vref turned off
AV
Reserved
Internal 2.56V Voltage Reference with external capacitor on AREF pin
CC
with external capacitor on AREF pin
Positive Differential
Input
N/A
“The ADC Data Register – ADCL and ADCH” on
Negative Differential
Input
AT90USB64/128
Table 25-4
for details. If these
Gain
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