ATMEGA16U4-AU Atmel, ATMEGA16U4-AU Datasheet - Page 313

• Manufacturer Part Number: ATMEGA16U4-AU
• Description: MCU AVR 16K FLASH USB 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16U4-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 26
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1.25K 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
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1.25 KB
• Interface Type: SPI, TWI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 26
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24.9.5
24.9.6
7766F–AVR–11/10
Digital Input Disable Register 0 – DIDR0
Digital Input Disable Register 2 – DIDR2
Table 24-6.
• Bit 7:4, 1:0 – ADC7D..4D - ADC1D..0D : ADC7:4 - ADC1:0 Digital Input Disable
When this bit is written logic one, the digital input buffer on the corresponding ADC pin is dis-
abled. The corresponding PIN Register bit will always read as zero when this bit is set. When an
analog signal is applied to the ADC7..4 / ADC1..0 pin and the digital input from this pin is not
needed, this bit should be written logic one to reduce power consumption in the digital input
buffer.
• Bit 5:0 – ADC13D..ADC8D: ADC13:8 Digital Input Disable
When this bit is written logic one, the digital input buffer on the corresponding ADC pin is dis-
abled. The corresponding PIN Register bit will always read as zero when this bit is set. When an
analog signal is applied to the ADC13..8 pin and the digital input from this pin is not needed, this
bit should be written logic one to reduce power consumption in the digital input buffer.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
ADTS3
1
1
1
ADC7D
ADC Auto Trigger Source Selections (Continued)
R/W
R/W
7
0
7
0
-
ADTS2
ADC6D
0
0
0
R/W
R/W
6
0
6
0
-
ADC13D
ADC5D
R/W
R/W
5
0
5
0
ADTS1
0
1
1
ADC12D
ADC4D
R/W
R/W
4
0
4
0
ADC11D
R/W
R/W
ADTS0
3
0
3
0
-
1
0
1
ADC10D
R/W
R/W
2
0
2
0
-
Trigger Source
Timer/Counter4 Compare Match A
Timer/Counter4 Compare Match B
Timer/Counter4 Compare Match D
ADC1D
ADC9D
R/W
R/W
ATmega16/32U4
1
0
1
0
ADC0D
ADC8D
R/W
R/W
0
0
0
0
DIDR0
DIDR2
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