ATMEGA32U4-AUR Atmel, ATMEGA32U4-AUR Datasheet - Page 306
ATMEGA32U4-AUR
Manufacturer Part Number
ATMEGA32U4-AUR
Description
MCU AVR 16K FLASH 16MHZ 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16U4-MU.pdf
(433 pages)
Specifications of ATMEGA32U4-AUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
26
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2.5K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
Quantity
Price
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7766F–AVR–11/10
Figure 24-15. Differential Measurement Range
Table 24-2.
Example 1:
V
V
V
...
V
V
V
...
V
V
V
ADCn
ADCm
ADCm
ADCm
ADCm
ADCm
ADCm
ADCm
ADCm
– ADMUX = 0xE9, MUX5 = 0 (ADC1 - ADC0, 10x gain, 2.56V reference, left adjusted
– Voltage on ADC1 is 300 mV, voltage on ADC0 is 500 mV.
– ADCR = 512 * 10 * (300 - 500) / 2560 = -400 = 0x270
+ 0.999 V
+ 0.998 V
+ 0.001 V
- 0.001 V
- 0.999 V
- V
result)
+ V
- V
REF
REF
REF
/GAIN
/GAIN
Correlation Between Input Voltage and Output Codes
REF
REF
REF
REF
REF
/GAIN
/GAIN
/GAIN
/GAIN
/GAIN
Read code
0x1FE
0x1FF
0x1FF
0x3FF
0x001
0x000
0x201
0x200
...
...
Output Code
0x3FF
0x1FF
0x000
0x200
0
Corresponding decimal value
511
511
510
...
1
0
-1
...
-511
-512
ATmega16/32U4
V
REF
Differential Input
Voltage (Volts)
306
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