ATMEGA162V_07 Datasheet, PDF (6/325 Pages) ATMEL Corporation – 8-bit Microcontroller with 16K Bytes In-System Programmable Flash

Port D (PD7..PD0)
Port E(PE2..PE0)
RESET
XTAL1
XTAL2
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 79.
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 82.
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 49. Shorter pulses are not guaranteed to generate a reset.
Input to the Inverting Oscillator amplifier and input to the internal clock operating circuit.
Output from the Inverting Oscillator amplifier.
6 ATmega162/V
2513I–AVR–02/07