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ATMEGA1281-16MUR 데이터시트(PDF) 7 Page - ATMEL Corporation

부품명 ATMEGA1281-16MUR
상세설명  8-bit Atmel Microcontroller with 16/32/64KB In-System Programmable Flash
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [SUMMARY]
2549QS–AVR–02/2014
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.
2.3
Pin Descriptions
2.3.1
VCC
Digital supply voltage.
2.3.2
GND
Ground.
2.3.3
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 buf-
fers 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 A also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on
page 75.
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 buf-
fers 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 B also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on
page 76.
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 buf-
fers 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 special features of the ATmega640/1280/1281/2560/2561 as listed on page 79.
Table 2-1.
Configuration Summary
Device
Flash
EEPROM
RAM
General
Purpose I/O pins
16 bits resolution
PWM channels
Serial
USARTs
ADC
Channels
ATmega640
64KB
4KB
8KB
86
12
4
16
ATmega1280
128KB
4KB
8KB
86
12
4
16
ATmega1281
128KB
4KB
8KB
54
6
2
8
ATmega2560
256KB
4KB
8KB
86
12
4
16
ATmega2561
256KB
4KB
8KB
54
6
2
8


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