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ATMEGA168A-AU 用户编程技术手册 - ATMEL（爱特美尔）
制造商:
ATMEL（爱特美尔）
分类:
8位微控制器
封装:
TQFP-32
描述:
ATMEL ATMEGA168A-AU 微控制器, 8位, 低功率高性能, ATmega, 20 MHz, 16 KB, 1 KB, 32 引脚, TQFP
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P2P3P78Hot
原理图在P5P8P76P94P96P97P98P113P118P119P121P122
封装尺寸在P637P638P639P640P641P649
型号编码规则在P629P630P631P632P633P634P635P636P649
封装信息在P637P649
技术参数、封装参数在P320
应用领域在P36P46P59P63P66P69P269P273P286
电气规格在P76P259P320
导航目录
ATMEGA168A-AU数据手册
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6
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
8271G–AVR–02/2013
The ATmega48A/PA/88A/PA/168A/PA/328/P provides the following features: 4K/8Kbytes of In-System Program-
mable Flash with Read-While-Write capabilities, 256/512/512/1Kbytes EEPROM, 512/1K/1K/2Kbytes SRAM,
23 general purpose I/O lines, 32 general purpose working registers, three flexible Timer/Counters with compare
modes, internal and external interrupts, a serial programmable USART, a byte-oriented 2-wire Serial Interface, an
SPI serial port, a 6-channel 10-bit ADC (8 channels in TQFP and QFN/MLF packages), a programmable Watchdog
Timer with internal Oscillator, and five software selectable power saving modes. The Idle mode stops the CPU
while allowing the SRAM, Timer/Counters, USART, 2-wire Serial Interface, SPI port, and interrupt system to con-
tinue 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 Power-save mode, the asynchronous timer continues to
run, allowing the user to maintain a timer base while the rest of the device is sleeping. The ADC Noise Reduction
mode stops the CPU and all I/O modules except asynchronous timer and ADC, to minimize switching noise during
ADC conversions. In Standby mode, the crystal/resonator Oscillator is running while the rest of the device is sleep-
ing. This allows very fast start-up combined with low power consumption.
Atmel
®
offers the QTouch
®
library for embedding capacitive touch buttons, sliders and wheels functionality into
AVR
®
microcontrollers. The patented charge-transfer signal acquisition offers robust sensing and includes fully
debounced reporting of touch keys and includes Adjacent Key Suppression
®
(AKS™) technology for unambiguous
detection of key events. The easy-to-use QTouch Suite toolchain allows you to explore, develop and debug your
own touch applications.
The device is manufactured using Atmel’s high density non-volatile memory technology. The On-chip ISP Flash
allows the program memory to be reprogrammed In-System through an SPI serial interface, by a conventional non-
volatile 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 opera-
tion. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip, the Atmel
ATmega48A/PA/88A/PA/168A/PA/328/P is a powerful microcontroller that provides a highly flexible and cost effec-
tive solution to many embedded control applications.
The ATmega48A/PA/88A/PA/168A/PA/328/P AVR is 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 Comparison Between Processors
The ATmega48A/PA/88A/PA/168A/PA/328/P differ only in memory sizes, boot loader support, and interrupt vector
sizes. Table 2-1 summarizes the different memory and interrupt vector sizes for the devices.
ATmega48A/PA/88A/PA/168A/PA/328/P support a real Read-While-Write Self-Programming mechanism. There is
a separate Boot Loader Section, and the SPM instruction can only execute from there. In ATmega 48A/48PA there
Table 2-1. Memory Size Summary
Device Flash EEPROM RAM Interrupt Vector Size
ATmega48A 4KBytes 256Bytes 512Bytes 1 instruction word/vector
ATmega48PA 4KBytes 256Bytes 512Bytes 1 instruction word/vector
ATmega88A 8KBytes 512Bytes 1KBytes 1 instruction word/vector
ATmega88PA 8KBytes 512Bytes 1KBytes 1 instruction word/vector
ATmega168A 16KBytes 512Bytes 1KBytes 2 instruction words/vector
ATmega168PA 16KBytes 512Bytes 1KBytes 2 instruction words/vector
ATmega328 32KBytes 1KBytes 2KBytes 2 instruction words/vector
ATmega328P 32KBytes 1KBytes 2KBytes 2 instruction words/vector
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