ATMEGA6450V-8AUR Просмотр технического описания (PDF) - Atmel Corporation

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ATMEGA6450V-8AUR

8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash

Atmel Corporation 

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P

2.2 Comparison Between

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P

Table 2-1.

Differences between: ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P

Device

Flash

EEPROM

RAM

MHz

ATmega165A

16 Kbyte

512 Bytes

1 Kbyte

16

ATmega165PA

16 Kbyte

512 Bytes

1 Kbyte

16

ATmega325A

32 Kbyte

1 Kbyte

2 Kbyte

20

ATmega325PA

32 Kbyte

1 Kbyte

2 Kbyte

20

ATmega3250A

32K bytes

1 Kbyte

2 Kbyte

20

ATmega3250PA

32 Kbyte

1 Kbyte

2 Kbyte

20

ATmega645A

64 Kbyte

2 Kbyte

4 Kbyte

16

ATmega645P

64 Kbyte

2 Kbyte

4 Kbyte

16

ATmega6450A

64 Kbyte

2 Kbyte

4 Kbyte

20

ATmega6450P

64 Kbyte

2 Kbyte

4 Kbyte

20

2.3 Pin Descriptions

2.3.1 VCC

2.3.2 GND

Digital supply voltage.

2.3.3

Ground.

Port A (PA7:PA0)

2.3.4

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 A also serves the functions of various special features of the

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on ”Alter-

nate Functions of Port B” on page 76.

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 B also serves the functions of various special features of the

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on ”Alter-

nate Functions of Port B” on page 76.

6

8285AS–AVR–10/10

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