ATMEGA32U4-AUR Atmel, ATMEGA32U4-AUR Datasheet - Page 53
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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8.0.6
8.0.7
8.0.8
7766F–AVR–11/10
Watchdog Reset
USB Reset
MCU Status Register – MCUSR
When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration. On
the falling edge of this pulse, the delay timer starts counting the Time-out period t
page 55
Figure 8-6.
When the USB controller is enabled and configured with the USB Reset CPU feature enabled
and if a valid USB Reset signalling is detected on the bus, the CPU core is reset but the USB
controller remains enabled and attached. This feature may be used to enhance device reliability.
Figure 8-7.
The MCU Status Register provides information on which reset source caused an MCU reset.
• Bit 7..6 - Reserved
These bits are reserved and should be read as 0. Do not set these bits.
Bit
Read/Write
Initial Value
for details on operation of the Watchdog Timer.
CC
DM
DP
CC
7
–
R
0
Watchdog Reset During Operation
USB Reset During Operation
6
–
R
0
USB Traffic
5
USBRF
R
0
CK
4
JTRF
R/W
See Bit Description
3
WDRF
R/W
2
BORF
R/W
End of Reset
1
EXTRF
R/W
ATmega16/32U4
USB Traffic
0
PORF
R/W
MCUSR
TOUT
. Refer to
53
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