atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 4

• Manufacturer Part Number: atmega32u4-16mu
• Description: Atmega32u4 8-bit Avr Microcontroller With 32k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

2.1
Figure 2-1.
4
AGND
AREF
AVCC
GND
VCC
Block Diagram
ATmega32U4
ON-CHIP DEBUG
Block Diagram
PROGRAMMING
BOUNDARY-
JTAG TAP
LOGIC
SCAN
DATA REGISTER
DATA REGISTER
TEMPERATURE
COMPARATOR
SENSOR
PORTE
ANALOG
PORTF
PF7 - PF4
PE6
ADC
The AVR core combines a rich instruction set with 32 general purpose working registers. All the
32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent
registers to be accessed in one single instruction executed in one clock cycle. The resulting
architecture is more code efficient while achieving throughputs up to ten times faster than con-
ventional CISC microcontrollers.
The ATmega32U4 provides the following features: 32K bytes of In-System Programmable Flash
with Read-While-Write capabilities, 1K bytes EEPROM, 2.5K bytes SRAM, 26 general purpose
I/O lines (CMOS outputs and LVTTL inputs), 32 general purpose working registers, four flexible
Timer/Counters with compare modes and PWM, one more high-speed Timer/Counter with com-
pare modes and PLL adjustable source, one USART (including CTS/RTS flow control signals), a
byte oriented 2-wire Serial Interface, a 12-channels 10-bit ADC with optional differential input
PORTF DRIVERS
PORTE DRIVERS
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
REGISTER
COUNTER
CONTROL
DECODER
FLASH
LINES
PE2
REG. PORTE
REG. PORTF
DATA DIR.
DATA DIR.
PF1 PF0
USART0
DATA REGISTER
POR - BOD
REGISTERS
REGISTER
GENERAL
PURPOSE
POINTER
STATUS
RESET
STACK
SRAM
PORTB
ALU
X
Y
Z
PORTB DRIVERS
PB7 - PB0
REG. PORTB
DATA DIR.
MCU CONTROL
HIGH SPEED
OSCILLATOR
TIMER/PWM
INTERRUPT
WATCHDOG
COUNTERS
INTERNAL
REGISTER
EEPROM
TIMERS/
TIMER
UNIT
SPI
8-BIT DA TA BUS
DATA REGISTER
PORTD
DATA REGISTER
PORTD DRIVERS
PC7
PD7 - PD0
PORTC
PC6
OSCILLATOR
TIMING AND
CALIB. OSC
USB 2.0
CONTROL
PORTC DRIVERS
PLL
REG. PORTD
DATA DIR.
REG. PORTC
TWO-WIRE SERIAL
DATA DIR.
INTERFACE
USB PAD 3V
REGULATOR
ON-CHIP
7766A–AVR–03/08
UCap
UVcc
VBUS
DP
DM
1uF