ATMEGA32U4-MU Atmel, ATMEGA32U4-MU Datasheet - Page 52
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ATMEGA32U4-MU
Manufacturer Part Number
ATMEGA32U4-MU
Description
MCU AVR 32K FLASH 16MHZ 44-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA32U4-MU
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-VQFN
Package
44QFN EP
Device Core
AVR
Family Name
ATmega
Maximum Speed
16 MHz
Operating Supply Voltage
3.3|5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
26
Interface Type
EBI/I2S/SPI/TWI/USART/USB
On-chip Adc
12-chx10-bit
Number Of Timers
5
For Use With
ATSTK524 - KIT STARTER ATMEGA32M1/MEGA32C1ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATMEGA32U4-16MU
ATMEGA32U4-16MU
ATMEGA32U4-16MU
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA32U4-MUR
Manufacturer:
UCC
Quantity:
1 001
- Current page: 52 of 433
- Download datasheet (9Mb)
8.0.5
7766F–AVR–11/10
Brown-out Detection
ATmega16U4/ATmega32U4 has an On-chip Brown-out Detection (BOD) circuit for monitoring
the V
BOD can be selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure
spike free Brown-out Detection. The hysteresis on the detection level should be interpreted as
V
Table 8-2.
Table 8-3.
When the BOD is enabled, and V
8-5), the Brown-out Reset is immediately activated. When V
(V
expired.
The BOD circuit will only detect a drop in V
ger than t
Figure 8-5.
Symbol
V
t
BOT+
BOD
BOT+
HYST
CC
= V
BODLEVEL 2..0 Fuses
in
level during operation by comparing it to a fixed trigger level. The trigger level for the
BOD
BOT
Figure
+ V
given in
BODLEVEL Fuse Coding
Brown-out Characteristics
Parameter
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
Brown-out Reset During Operation
INTERNAL
TIME-OUT
111
110
101
100
011
010
001
000
HYST
8-5), the delay counter starts the MCU after the Time-out period t
RESET
RESET
V
CC
/2 and V
Table
8-1.
BOT-
CC
= V
decreases to a value below the trigger level (V
BOT
V
BOT-
Min V
- V
1.8
2.0
2.2
2.4
3.2
3.3
4.0
CC
HYST
BOT
if the voltage stays below the trigger level for lon-
/2.
Typ V
2.0
2.2
2.4
2.6
3.4
3.5
4.3
BOD Disabled
CC
BOT
V
t
TOUT
Min
BOT+
increases above the trigger level
ATmega16/32U4
Typ
50
Max V
2.2
2.4
2.6
2.8
3.6
3.7
4.5
BOT
Max
BOT-
TOUT
in
Units
Units
mV
Figure
V
ns
has
52
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