ATMEGA32U4RC-MUR Atmel, ATMEGA32U4RC-MUR Datasheet - Page 22

no-image

ATMEGA32U4RC-MUR

Manufacturer Part Number
ATMEGA32U4RC-MUR
Description
IC MPU AVR 16K 16MHZ 44QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet

Specifications of ATMEGA32U4RC-MUR

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
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-VFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
8.5
7766FS–AVR–11/10
ATmega16U4/ATmega32U4 Rev A
1. Spike on TWI pins when TWI is enabled
2. High current consumption in sleep mode
3. Increased power comsumption in power-down mode
4. Internal RC oscillator start up may fail
5. Internal RC oscillator calibration
6. Incorrect execution of VBUSTI interrupt
Spike on TWI pins when TWI is enabled
High current consumption in sleep mode
Increased power consumption in power-down mode
Internal RC oscillator start up may fail
Internal RC oscillator calibration
Incorrect execution of VBUSTI interrupt
Timer 4 enhanced mode issue
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 typical power consumption is increased by about 30 µA in power-down mode.
Problem Fix/work around
None.
When the part is configured to start on internal RC oscillator, the oscillator may not start
properly after power-on.
Problem Fix/work around
Do not configure the part to start on internal RC oscillator.
8 MHz frequency can be impossible to reach with internal RC even when using maximal
OSCAL value.
Problem Fix/work around
None.
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.
ATmega16/32U4
22

Related parts for ATMEGA32U4RC-MUR