ATMEGA161_07 datasheet, PDF - EEWORLD Datasheet

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ATMEGA161_07: Description8-bit Microcontroller with 16K Bytes of In-System Programmable Flash; File Size2MB，159 Pages; ManufacturerAtmel (Microchip)

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ATMEGA161_07 Overview

8-bit Microcontroller with 16K Bytes of In-System Programmable Flash

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Features

•

High-performance, Low-power AVR

8-bit Microcontroller

•

Advanced RISC Architecture

– 130 Powerful Instructions – Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 8 MIPS Throughput at 8 MHz

– On-chip 2-cycle Multiplier

Program and Data Memories

– 16K Bytes of Non-volatile In-System Programmable Flash Endurance: 1,000

Write/Erase Cycles

– Optional Boot Code Memory with Independent Lock bits Self-programming of

Program and Data Memories

– 512 Bytes of Non-volatile In-System Programmable EEPROM Endurance: 100,000

Write/Erase Cycles

– 1K Byte of Internal SRAM

– Programming Lock for Software Security

Peripheral Features

– Two 8-bit Timer/Counters with Separate Prescaler and PWM

– Expanded 16-bit Timer/Counter System with Separate Prescaler, Compare,

Capture Modes and Dual 8-, 9-, or 10-bit PWM

– Dual Programmable Serial UARTs

– Master/Slave SPI Serial Interface

– Real-time Counter with Separate Oscillator

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-chip Analog Comparator

Special Microcontroller Features

– Power-on Reset

– External and Internal Interrupt Sources

– Three Sleep Modes: Idle, Power-save and Power-down

Power Comsumption at 4 MHz, 3.0V, 25°C

– Active 3.0 mA

– Idle Mode 1.2 mA

– Power-down Mode < 1 µA

I/O and Packages

– 35 Programmable I/O Lines

– 40-lead PDIP and 44-lead TQFP

Operating Voltages

– 2.7V - 5.5V for the ATmega161L

– 4.0V - 5.5V for the ATmega161

Speed Grades

– 0 - 4 MHz for the ATmega161L

– 0 - 8 MHz for the ATmega161

Commercial and Industrial Temperature Ranges

•

8-bit

Microcontroller

with 16K Bytes

of In-System

Programmable

Flash

ATmega161

ATmega161L

•

Disclaimer

Typical values contained in this data sheet are based on simulations and characteriza-

tion of other AVR microcontrollers manufactured on the same process technology.

Min and Max values will be available after the device is characterized.

Note:

Not recommended in new

designs.

Rev. 1228D–AVR–02/07

ATmega161(L)

Description

The ATmega161 is a low-power CMOS 8-bit microcontroller based on the AVR RISC

architecture. By executing powerful instructions in a single clock cycle, the ATmega161

achieves throughputs approaching 1 MIPS per MHz allowing the system designer to

optimize power consumption versus processing speed. 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 architec-

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

conventional CISC microcontrollers.

The ATmega161 provides the following features: 16K bytes of In-System or Self-

programmable Flash, 512 bytes EEPROM, 1K byte of SRAM, 35 general purpose I/O

lines, 32 general purpose working registers, Real-time Counter, three flexible

Timer/Counters with Compare modes, internal and external interrupts, two programma-

ble serial UARTs, programmable Watchdog Timer with internal Oscillator, an SPI serial

port and three software-selectable power saving 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 and SRAM contents but freezes

the Oscillator, disabling all other chip functions until the next External Interrupt or Hard-

ware Reset. In Power-save mode, the timer Oscillator continues to run, allowing the

user to maintain a timer base while the rest of the device is sleeping.

The device is manufactured using Atmel’s high-density non-volatile memory technology.

The On-chip Flash Program memory can be reprogrammed using the Self-programming

capability through the Boot Block and an ISP through the SPI port, or by using a conven-

tional non-volatile Memory programmer. By combining an enhanced RISC 8-bit CPU

with In-System Programmable Flash on a monolithic chip, the Atmel ATmega161 is a

powerful microcontroller that provides a highly flexible and cost-effective solution to

many embedded control applications.

The ATmega161 AVR is supported with a full suite of program and system development

tools including: C compilers, macro assemblers, program debugger/simulators, In-Cir-

cuit Emulators and evaluation kits.

1228D–AVR–02/07

ATmega161(L)

Pin Descriptions

VCC

GND

Port A (PA7..PA0)

Supply voltage.

Ground.

Port A is an 8-bit bi-directional I/O port. Port pins can provide internal pull-up resistors

(selected for each bit). The Port A output buffers can sink 20 mA and can drive LED dis-

plays directly. When pins PA0 to PA7 are used as inputs and are externally pulled low,

they will source current if the internal pull-up resistors are activated. The Port A pins are

tri-stated when a reset condition becomes active, even if the clock is not running.

Port A serves as a Multiplexed Address/Data port when using external memory

interface.

Port B (PB7..PB0)

Port B is an 8-bit bi-directional I/O port with internal pull-up resistors. The Port B output

buffers can sink 20 mA. 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 ATmega161 as listed

on page 92.

Port C (PC7..PC0)

Port C is an 8-bit bi-directional I/O port with internal pull-up resistors. The Port C output

buffers can sink 20 mA. 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 as an address high output when using external memory interface.

Port D (PD7..PD0)

Port D is an 8-bit bi-directional I/O port with internal pull-up resistors. The Port D output

buffers can sink 20 mA. 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.

Port D also serves the functions of various special features of the ATmega161 as listed

on page 101.

Port E (PE2..PE0)

Port E is a 3-bit bi-directional I/O port with internal pull-up resistors. The Port E output

buffers can sink 20 mA. As inputs, Port E pins that are externally pulled low will source

current if the pull-up resistors are activated. The Port E pins are tri-stated when a reset

condition becomes active, even if the clock is not running.

Port E also serves the functions of various special features of the ATmega161 as listed

on page 107.

RESET

Reset input. A low level on this pin for more than 500 ns will generate a Reset, even if

the clock is not running. Shorter pulses are not guaranteed to generate a Reset.

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

Output from the inverting Oscillator amplifier.

XTAL1

XTAL2

1228D–AVR–02/07

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