ATMEGA32U4-MU Atmel, ATMEGA32U4-MU Datasheet - Page 42

• 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

7766F–AVR–11/10
The optimal PLL configuration at 5V is: PLL output frequency = 96 MHz, divided by 1.5 to gener-
ate the 64 MHz High Speed Timer clock, and divided by 2 to generate the 48 MHz USB clock.
PDIV3
0
0
0
1
1
1
1
1
1
1
1
PDIV2
1
1
1
0
0
0
0
1
1
1
1
PDIV1
0
1
1
0
0
1
1
0
0
1
1
PDIV0
1
0
1
0
1
0
1
0
1
0
1
PLL Output Frequency
Not allowed
Not allowed
Not allowed
Not allowed
Not allowed
Not allowed
56 MHz
72 MHz
80 MHz
88 MHz
96 MHz
ATmega16/32U4
42