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ATMEGA162 Datasheet(PDF) 6 Page - ATMEL Corporation

Part No. ATMEGA162
Description  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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ATMEGA162 Datasheet(HTML) 6 Page - ATMEL Corporation

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6
ATmega162/V
2513IS–AVR–02/07
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 ATmega162 as listed
on page 77.
Port E(PE2..PE0)
Port E is an 3-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port E output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port E pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port E pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port E also serves the functions of various special features of the ATmega162 as listed
on page 80.
RESET
Reset input. A low level on this pin for longer than the minimum pulse length will gener-
ate a Reset, even if the clock is not running. The minimum pulse length is given in Table
18 on page 47. Shorter pulses are not guaranteed to generate a reset.
XTAL1
Input to the Inverting Oscillator amplifier and input to the internal clock operating circuit.
XTAL2
Output from the Inverting Oscillator amplifier.


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