ATmega162 datasheet(6/324 Pages) ATMEL

6 / 324 page

2513K–AVR–07/09

ATmega162/V

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

78.

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

81.

RESET

Reset input. A low level on this pin for longer than the minimum pulse length will generate a

Reset, even if the clock is not running. The minimum pulse length is given in Table 18 on page

48. 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.

ATmega162 Datenblatt(PDF) 6 Page - ATMEL Corporation