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ATMEGA169P 데이터시트(HTML) 5 Page - ATMEL Corporation

부품명 ATMEGA169P
상세내용  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
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제조사  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
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ATMEGA169P 데이터시트(HTML) 5 Page - ATMEL Corporation

 
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5
8018IS–AVR–11/06
ATmega169P
2.2
Pin Descriptions
2.2.1
VCC
Digital supply voltage.
2.2.2
GND
Ground.
2.2.3
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 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 ATmega169P as listed on
”Alternate Functions of Port A” on page 72.
2.2.4
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 B also serves the functions of various special features of the ATmega169P as listed on
”Alternate Functions of Port B” on page 73.
2.2.5
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
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 ATmega169P as listed on ”Alternate
Functions of Port C” on page 76.
2.2.6
Port D (PD7:PD0)
Port D is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port D output buffers have symmetrical drive characteristics with both high sink and source
capability. 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 ATmega169P as listed on
”Alternate Functions of Port D” on page 78.


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