ATMEGA32U4-MU Atmel, ATMEGA32U4-MU Datasheet - Page 4
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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
5. Application Overview
4
AVR298
The USB audio application manages the data exchange between the PC and the PWM hard-
ware (speaker) and ADC hardware (microphone). When a sound is played on the PC, the USB
device receives a periodic unsynchronized OUT endpoints, and when the record microphone is
running then the USB device receives a periodic unsynchronized IN endpoints.
Figure 5-1.
During the USB enumeration, the USB device describes the frequency and the formats of the
audio data. In the demo, the data format used is the PCM, the speaker uses 16-bit mono at
32KHz, and the microphone uses 16-bit mono at 8KHz.
PC play
PC record
Application data exchange
OUT endpoint
PCM 16bits mono at 32KHz
PCM 16bits mono at 8KHz
IN endpoint
PWM
ADC
Speaker
Microphone
9bits mono at 32KHz
8bits mono at 8KHz
7820A–AVR–11/08