ATMEGA32U4-MU Atmel, ATMEGA32U4-MU Datasheet - Page 151
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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
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- Download datasheet (9Mb)
15.8.2
7766F–AVR–11/10
Fast PWM Mode
The Output Compare Pin configurations in Normal Mode are described in
Table 15-2.
The fast Pulse Width Modulation or fast PWM mode (PWM4x = 1 and WGM40 = 0) provides a
high frequency PWM waveform generation option. The fast PWM differs from the other PWM
option by its single-slope operation. The counter counts from BOTTOM to TOP (defined as
OCR4C) then restarts from BOTTOM. In non-inverting Compare Output mode the Waveform
Output (OCW4x) is cleared on the Compare Match between TCNT4 and OCR4x and set at
BOTTOM. In inverting Compare Output mode, the Waveform Output is set on Compare Match
and cleared at BOTTOM. In complementary Compare Output mode the Waveform Output is
cleared on the Compare Match and set at BOTTOM.
Due to the single-slope operation, the operating frequency of the fast PWM mode can be twice
as high as the Phase and Frequency Correct PWM mode that use dual-slope operation. This
high frequency makes the fast PWM mode well suited for power regulation, rectification, and
DAC applications. High frequency allows physically small sized external components (coils,
capacitors), and therefore reduces total system cost.
The timing diagram for the fast PWM mode is shown in
mented until the counter value matches the TOP value. The counter is then cleared at the
following timer clock cycle. The TCNT4 value is in the timing diagram shown as a histogram for
illustrating the single-slope operation. The diagram includes the Waveform Output in non-
inverted and inverted Compare Output modes. The small horizontal line marks on the TCNT4
slopes represent Compare Matches between OCR4x and TCNT4.
Figure 15-13. Fast PWM Mode, Timing Diagram
COM4x1
0
0
1
1
TCNTn
OCWnx
OCWnx
Period
(COMnx1:0 = 2)
(COMnx1:0 = 3)
Output Compare Pin Configurations in Normal Mode
1
COM4x0
0
1
0
1
2
3
OC4x Pin
Disconnected
Disconnected
Disconnected
Disconnected
4
5
6
Figure
7
ATmega16/32U4
15-13. The counter is incre-
OC4x Pin
Disconnected
OC4x
OC4x
OC4x
OCRnx Interrupt Flag Set
OCRnx Update and
TOVn Interrupt Flag Set
Table
15-2.
151
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