ATMEGA32U4-MUR Atmel, ATMEGA32U4-MUR Datasheet - Page 149
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
ATMEGA32U4-MUR
Manufacturer Part Number
ATMEGA32U4-MUR
Description
MCU AVR 16K FLASH 16MHZ 44VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16U4-MU.pdf
(433 pages)
Specifications of ATMEGA32U4-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
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-VQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA32U4-MUR
Manufacturer:
UCC
Quantity:
1 001
- Current page: 149 of 433
- Download datasheet (9Mb)
15.7
15.8
15.8.1
7766F–AVR–11/10
Synchronous update
Modes of Operation
Normal Mode
To avoid unasynchronous and incoherent values in a cycle, if a synchronous update of one of
several values is necessary, all values can be updated at the same time at the end of the PWM
cycle by the Timer controller. The new set of values is calculated by software and the effective
update can be initiated by software.
Figure 15-11. Lock feature and Synchronous update
In normal operation, each write to a Compare register is effective at the end of the current cycle.
But some cases require that two or more Compare registers are updated synchronously, and
that may not be always possible, mostly at high speed PWM frequencies. That may result in
some PWM periods with incoherent values.
When using the Lock feature (TLOCK4=1), the values written to the Compare registers are not
effective and temporarily buffered. When releasing the TLOCK4 bit, the update is initiated and
the new whole set of values will be loaded at the end of the current PWM cycle.
See
The mode of operation, i.e., the behavior of the Timer/Counter and the Output Compare pins, is
defined by the combination of the Waveform Generation mode (bits PWM4x and WGM40) and
Compare Output mode (COM4x1:0) bits. The Compare Output mode bits do not affect the
counting sequence, while the Waveform Generation mode bits do. The COM4x1:0 bits control
whether the PWM output generated should be inverted, non-inverted or complementary. For
non-PWM modes the COM4x1:0 bits control whether the output should be set, cleared, or tog-
gled at a Compare Match.
The simplest mode of operation is the Normal mode (PWM4x = 0), the counter counts from
BOTTOM to TOP (defined as OCR4C) then restarts from BOTTOM. The OCR4C defines the
TOP value for the counter, hence also its resolution, and allows control of the Compare Match
output frequency. In toggle Compare Output Mode the Waveform Output (OCW4x) is toggled at
Compare Match between TCNT4 and OCR4x. In non-inverting Compare Output Mode the
Cycle with
Set i
Regulation Loop
Calculation
Section 15.12.5 ”TCCR4E – Timer/Counter4 Control Register E” on page
– Setting OCR4A = 0x85 (= b’10000101’) signifies that the true value of “Compare A”
register is 0x42 (b’01000010’) and that the Enhanced bit is set. That means that the
duty cycle obtained (51.95%) will be the intermediate value between duty cycles that
can be obtained by 0x42 and 0x43 Compare values (51.56%, 52.34%).
Cycle with
Set i
TLOCK4=1
Writing to Timer
Registers Set j
Cycle with
Set i
TLOCK4=0
Cycle with
Set i
Request for an
Update
Cycle with
Set j
ATmega16/32U4
169.
149
Related parts for ATMEGA32U4-MUR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATmega32](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATMEGA32-8AU](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
ATMEL Corporation
Datasheet:
![ATMEGA32-16MU](/photos/12/13/121316/313-44-qfn_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ 5V 44-QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16PU](/photos/6/70/67049/453-40-dip_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ 5V 40DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16AU](/photos/6/70/67042/313-44-tqfp_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ 5V 44TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16PI](/photos/6/70/67049/453-40-dip_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ IND 40-DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16AI](/photos/6/70/67042/313-44-tqfp_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ IND 44-TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16AUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 32KB FLASH 16MHZ 44TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16MUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 32KB FLASH 16MHZ 44QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16AQ](/photos/6/70/67042/313-44-tqfp_tmb.jpg)
Part Number:
Description:
MCU AVR 32K FLASH 16MHZ 44-TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16PC](/photos/6/70/67049/453-40-dip_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ COM 40-DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16MC](/photos/12/13/121316/313-44-qfn_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ COM 44-QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA32-16AC](/photos/6/70/67042/313-44-tqfp_tmb.jpg)
Part Number:
Description:
IC AVR MCU 32K 16MHZ COM 44-TQFP
Manufacturer:
Atmel
Datasheet: