ATMEGA32U4-AUR Atmel, ATMEGA32U4-AUR Datasheet - Page 420
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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35.3
35.4
7766F–AVR–11/10
ATmega16U4/ATmega32U4 Rev C
ATmega16U4/ATmega32U4 Rev B
3.
Not sampled
•
•
•
•
1. Spike on TWI pins when TWI is enabled
2. High current consumption in sleep mode
3. Incorrect execution of VBUSTI interrupt
4.
Spike on TWI pins when TWI is enabled
High current consumption in sleep mode
Incorrect execution of VBUSTI interrupt
Timer 4 11-bits enhanced PWM mode
T
Timer 4 11-bits enhanced mode is not functional.
Problem Fix/work around
None.
100 ns negative spike occurs on SDA and SCL pins when TWI is enabled.
Problem Fix/work around
Enable ATmega16U4/ATmega32U4 TWI before the other nodes of the TWI network.
If a pending interrupt cannot wake the part up from the selected mode, the current consump-
tion will increase during sleep when executing the SLEEP instruction directly after a SEI
instruction.
Problem Fix/work around
Before entering sleep, interrupts not used to wake up the part from the sleep mode should
be disabled.
The CPU may incorrectly execute the interrupt vector related to the VBUSTI interrupt flag.
Problem fix/work around
Do not enable this interrupt. Firmware must process this USB event by polling VBUSTI.
T
Timer 4 11-bits enhanced mode is not functional.
Problem Fix/work around
None.
imer 4 11-bits enhanced PWM mode
imer 4 11-bits enhanced PWM mode
ATmega16/32U4
420
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