ATMEGA8U2_12 datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > semiconductor> The embedded processor and controller> ATMEGA8U2_12

ATMEGA8U2_12: Description8-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP32; Categorysemiconductor The embedded processor and controller; File Size345KB，22 Pages; ManufacturerAtmel (Microchip)

Download Datasheet Parametric Compare View All

ATMEGA8U2_12 Overview

8-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP32

ATMEGA8U2_12 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	32
Maximum operating temperature	85 Cel
Minimum operating temperature	-40 Cel
Maximum supply/operating voltage	5.5 V
Minimum supply/operating voltage	4.5 V
Rated supply voltage	5 V
External data bus width	0.0
Number of input and output buses	22
Line speed	16 MHz
Processing package description	7 × 7 MM, 1.20 MM HEIGHT, 0.80 MM PITCH, TQFP-32
state	ACTIVE
Craftsmanship	CMOS
packaging shape	SQUARE
Package Size	FLATPACK, THIN PROFILE
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	0.8000 mm
Terminal location	Four
Packaging Materials	Plastic/Epoxy
Temperature level	INDUSTRIAL
Address bus width	0.0
Number of digits	8
Maximum FCLK clock frequency	16 MHz
Microprocessor type	Reduced Instruction Set Microcontroller
PWM channel	Yes
ROM programming	FLASH

Preview

Download Datasheet

View All

Features

•

High Performance, Low Power AVR

8-Bit Microcontroller

•

Advanced RISC Architecture

– 125 Powerful Instructions – Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 16 MIPS Throughput at 16 MHz

•

Non-volatile Program and Data Memories

– 8K/16K/32K Bytes of In-System Self-Programmable Flash

– 512/512/1024 EEPROM

– 512/512/1024 Internal SRAM

– Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM

– Data retention: 20 years at 85C/ 100 years at 25C

(1)

– Optional Boot Code Section with Independent Lock Bits

In-System Programming by on-chip Boot Program hardware-activated after

reset

True Read-While-Write Operation

– Programming Lock for Software Security

•

USB 2.0 Full-speed Device Module with Interrupt on Transfer Completion

– Complies fully with Universal Serial Bus Specification REV 2.0

– 48 MHz PLL for Full-speed Bus Operation : data transfer rates at 12 Mbit/s

– Fully independant 176 bytes USB DPRAM for endpoint memory allocation

– Endpoint 0 for Control Transfers: from 8 up to 64-bytes

– 4 Programmable Endpoints:

IN or Out Directions

Bulk, Interrupt and IsochronousTransfers

Programmable maximum packet size from 8 to 64 bytes

Programmable single or double buffer

– Suspend/Resume Interrupts

– Microcontroller reset on USB Bus Reset without detach

– USB Bus Disconnection on Microcontroller Request

•

Peripheral Features

– One 8-bit Timer/Counters with Separate Prescaler and Compare Mode (two 8-bit

PWM channels)

– One 16-bit Timer/Counter with Separate Prescaler, Compare and Capture Mode

(three 8-bit PWM channels)

– USART with SPI master only mode and hardware flow control (RTS/CTS)

– Master/Slave SPI Serial Interface

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-chip Analog Comparator

– Interrupt and Wake-up on Pin Change

•

On Chip Debug Interface (debugWIRE)

•

Special Microcontroller Features

– Power-On Reset and Programmable Brown-out Detection

– Internal Calibrated Oscillator

– External and Internal Interrupt Sources

– Five Sleep Modes: Idle, Power-save, Power-down, Standby, and Extended Standby

•

I/O and Packages

– 22 Programmable I/O Lines

– QFN32 (5x5mm) / TQFP32 packages

•

Operating Voltages

– 2.7 - 5.5V

•

Operating temperature

– Industrial (-40°C to +85°C)

•

Maximum Frequency

– 8 MHz at 2.7V - Industrial range

– 16 MHz at 4.5V - Industrial range

Note:

1. See

“Data Retention” on page 6

for details.

8-bit

Microcontroller

with

8/16/32K Bytes

of ISP Flash

and USB

Controller

ATmega8U2

ATmega16U2

ATmega32U2

7799ES–AVR–09/2012

ATmega8U2/16U2/32U2

architecture is more code efficient while achieving throughputs up to ten times faster than con-

ventional CISC microcontrollers.

The ATmega8U2/16U2/32U2 provides the following features: 8K/16K/32K Bytes of In-System

Programmable Flash with Read-While-Write capabilities, 512/512/1024 Bytes EEPROM,

512/512/1024 SRAM, 22 general purpose I/O lines, 32 general purpose working registers, two

flexible Timer/Counters with compare modes and PWM, one USART, a programmable Watch-

dog Timer with Internal Oscillator, an SPI serial port, debugWIRE interface, also used for

accessing the On-chip Debug system and programming and five software selectable power sav-

ing modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port,

and interrupt system to continue functioning. The Power-down mode saves the register contents

but freezes the Oscillator, disabling all other chip functions until the next interrupt or Hardware

Reset. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device

is sleeping. This allows very fast start-up combined with low power consumption. In Extended

Standby mode, the main Oscillator continues to run.

The device is manufactured using Atmel’s high-density nonvolatile memory technology. The on-

chip ISP Flash allows the program memory to be reprogrammed in-system through an SPI serial

interface, by a conventional nonvolatile memory programmer, or by an on-chip Boot program

running on the AVR core. The boot program can use any interface to download the application

program in the application Flash memory. Software in the Boot Flash section will continue to run

while the Application Flash section is updated, providing true Read-While-Write operation. By

combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip,

the Atmel ATmega8U2/16U2/32U2 is a powerful microcontroller that provides a highly flexible

and cost effective solution to many embedded control applications.

The ATmega8U2/16U2/32U2 are supported with a full suite of program and system develop-

ment tools including: C compilers, macro assemblers, program debugger/simulators, in-circuit

emulators, and evaluation kits.

2.2

2.2.1

Pin Descriptions

VCC

Digital supply voltage.

2.2.2

GND

Ground.

2.2.3

AVCC

AVCC is the supply voltage pin (input) for all analog features (Analog Comparator, PLL). It

should be externally connected to VCC through a low-pass filter.

2.2.4

Port B (PB7..PB0)

Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The

Port B output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port B pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port B pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

Port B also serves the functions of various special features of the ATmega8U2/16U2/32U2 as

listed on

page 74.

7799ES–AVR–09/2012

ATmega8U2/16U2/32U2

2.2.5

Port C (PC7..PC0)

Port C is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The

Port C output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port C pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port C pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

Port C also serves the functions of various special features of the ATmega8U2/16U2/32U2 as

listed on

page 77.

2.2.6

Port D (PD7..PD0)

Port D serves as analog inputs to the analog comparator.

Port D also serves as an 8-bit bi-directional I/O port, if the analog comparator is not used (con-

cerns PD2/PD1 pins). Port pins can provide internal pull-up resistors (selected for each bit). The

Port D output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port D pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port D pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

2.2.7

D-

USB Full Speed Negative Data Upstream Port

2.2.8

D+

USB Full Speed Positive Data Upstream Port

2.2.9

UGND

USB Ground.

2.2.10

UVCC

USB Pads Internal Regulator Input supply voltage.

2.2.11

UCAP

USB Pads Internal Regulator Output supply voltage. Should be connected to an external capac-

itor (1μF).

2.2.12

RESET/PC1/dW

Reset input. A low level on this pin for longer than the minimum pulse length will generate a

reset, even if the clock is not running. The minimum pulse length is given in

“System Control and

Reset” on page 47.

Shorter pulses are not guaranteed to generate a reset. This pin alternatively

serves as debugWire channel or as generic I/O. The configuration depends on the fuses RST-

DISBL and DWEN.

XTAL1

Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

2.2.14

XTAL2/PC0

Output from the inverting Oscillator amplifier if enabled by Fuse. Also serves as a generic I/O.

2.2.13

7799ES–AVR–09/2012

ATMEGA8U2_12 Related Products

	ATMEGA8U2_12	ATMEGA8U2
Description	8-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP32	8-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP32
Number of functions	1	1
Number of terminals	32	32
Maximum operating temperature	85 Cel	85 Cel
Minimum operating temperature	-40 Cel	-40 Cel
Maximum supply/operating voltage	5.5 V	5.5 V
Minimum supply/operating voltage	4.5 V	4.5 V
Rated supply voltage	5 V	5 V
External data bus width	0.0	0.0
Number of input and output buses	22	22
Line speed	16 MHz	16 MHz
Processing package description	7 × 7 MM, 1.20 MM HEIGHT, 0.80 MM PITCH, TQFP-32	7 × 7 MM, 1.20 MM HEIGHT, 0.80 MM PITCH, TQFP-32
state	ACTIVE	ACTIVE
Craftsmanship	CMOS	CMOS
packaging shape	SQUARE	SQUARE
Package Size	FLATPACK, THIN PROFILE	FLATPACK, THIN PROFILE
surface mount	Yes	Yes
Terminal form	GULL WING	GULL WING
Terminal spacing	0.8000 mm	0.8000 mm
Terminal location	Four	Four
Packaging Materials	Plastic/Epoxy	Plastic/Epoxy
Temperature level	INDUSTRIAL	INDUSTRIAL
Address bus width	0.0	0.0
Number of digits	8	8
Maximum FCLK clock frequency	16 MHz	16 MHz
Microprocessor type	Reduced Instruction Set Microcontroller	Reduced Instruction Set Microcontroller
PWM channel	Yes	Yes
ROM programming	FLASH	FLASH

Recommended Resources

Light control switch circuit controlled by flashlight 2

Kana brand BCD-220 refrigerator circuit

Konka 60P movement rear projection color TV field fault protection circuit diagram

Current feedback amplification circuit diagram

Use the TV remote control to turn off the power supply of electrical appliances circuit diagram

Bias magnetic oscillator circuit for recording

Make a 360-degree rotating advertising light that displays time: :):):)...; ddllxxrr Renesas Electronics MCUs

Detailed explanation of Linux system network service configuration file: In Linux system, TCP/IP network is configured through several text files. You may need to edit these files to complete networking work, but most of these configuration files can be implemented through...; sunplusedu2012a Linux and Android

windows ce stream driver wizard: I have searched the entire Internet but could not find the Windows CE Stream Driver Wizard tool. If any brother or sister can generously help me, I would be grateful. My email address is: cougarz@soma...; cy214 Embedded System

The following problems occur in 8051fxxx IDE: note: USB address and data registers will not be valid until USB clock is running What causes this?...; 249863865 51mcu

Issues with chip drive power and load size: [backcolor=white][color=#333333][font="][size=14px]As shown in Figure 1, the user manual of the digital power amplifier chip TPA3106 clearly states that under 25V power supply, it can output 40W power...; shaorc Analog electronics

Which expert has used the basic database examples in the book "EVC Advanced Programming and Application Development"?: I tried this program under wince, but it doesn't work. I can't add it or delete it. Is there any other program I need to install or is there something wrong with the instance program itself?...; beck21 Embedded System

Shortcut: L0 L1 L2 L3 L4 L5 L6 L7 L8 L9 LA LB LC LD LE LF LG LH LI LJ LK LL LM LN LO LP LQ LR LS LT LU LV LW LX LY LZ M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 MA MB MC MD ME MF MG MH MI MJ MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ N0 N1 N2 N3 N4 N5 N6 N7 N8 NA NB NC ND NE NF NG NH NI NJ NK NL NM NN NO NP NQ NR NS NT NU NV NX NZ O0 O1 O2 O3 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OP OQ OR OS OT OV OX OY OZ P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 PA PB PC PD PE PF PG PH PI PJ PK PL PM PN PO PP PQ PR PS PT PU PV PW PX PY PZ Q1 Q2 Q3 Q4 Q5 Q6 Q8 Q9 QA QB QC QE QF QG QH QK QL QM QP QR QS QT QV QW QX QY R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 RA RB RC RD RE RF RG RH RI RJ RK RL RM RN RO RP RQ RR RS RT RU RV RW RX RY RZ

Popular Components