Datasheet > A000063

A000063

更新时间： 2022-05-13 23:37:24

品牌	Logo	应用领域
爱特美尔 - ATMEL		闪存微控制器
页数	文件大小	规格书
40页	1116K
描述
8-bit Atmel Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash

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A000063 数据手册

ATmega640/1280/1281/2560/2561

2.2

Comparison Between ATmega1281/2561 and ATmega640/1280/2560

Each device in the ATmega640/1280/1281/2560/2561 family differs only in memory size and

number of pins. Table 2-1 summarizes the different configurations for the six devices.

Table 2-1.

Device

Configuration Summary

General

Purpose I/O pins

16 bits resolution

PWM channels

Serial

USARTs

ADC

Channels

Flash

64KB

EEPROM

4KB

RAM

8KB

ATmega640

ATmega1280

ATmega1281

ATmega2560

ATmega2561

128KB

256KB

4KB

2.3

Pin Descriptions

2.3.1

VCC

Digital supply voltage.

Ground.

2.3.2

2.3.3

GND

Port A (PA7..PA0)

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

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

capability. As inputs, Port A pins that are externally pulled low will source current if the 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

also serves the functions of various special features of the

ATmega640/1280/1281/2560/2561 as listed on page 78.

2.3.4

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 has better driving capabilities than the other ports.

Port

also serves the functions of various special features of the

ATmega640/1280/1281/2560/2561 as listed on page 79.

2.3.5

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

2549NS–AVR–05/11

1...4 5 678 9 10...40

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