ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 3
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ATmega32U2
Manufacturer Part Number
ATmega32U2
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U2
Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
22
Ext Interrupts
20
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
5
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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2. Overview
The ATmega8U2/16U2/32U2 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture.
By executing powerful instructions in a single clock cycle, the ATmega8U2/16U2/32U2 achieves throughputs approaching
1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
2.1
Figure 2-1.
7799D–AVR–11/10
GND
VCC
Block Diagram
ON-CHIP DEBUG
PROGRAMMING
Debug-Wire
LOGIC
Block Diagram
DATA REGISTER
USART1
PORTD
PORTD DRIVERS
PD7 - PD0
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
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
REGISTER
COUNTER
CONTROL
DECODER
FLASH
LINES
REG. PORTD
DATA DIR.
SPI
POR - BOD
REGISTERS
REGISTER
PURPOSE
GENERAL
POINTER
STATUS
STACK
RESET
SRAM
DATA REGISTER
ALU
X
Y
Z
PORTC
PORTC DRIVERS
PC7 - PC0
REG. PORTC
DATA DIR.
MCU CONTROL
OSCILLATOR
WATCHDOG
INTERRUPT
COUNTERS
REGISTER
INTERNAL
EEPROM
TIMER/
TIMER
UNIT
8-BIT DA TA BUS
DATA REGISTER
PORTB
OSCILLATOR
ATmega8U2/16U2/32U2
TIMING AND
CALIB. OSC
CONTROL
PORTB DRIVERS
PLL
USB
PS/2
PB7 - PB0
REG. PORTB
DATA DIR.
REGULATOR
ON-CHIP
3.3V
UVcc
D+/SCK
D-/SDATA
1uF
UCap
3
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