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ATMEGA324P-A15MZ

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

Atmel Corporation 

ATmega164P/324P/644P

2.2.1

Automotive Quality Grade

The ATmega164P/324P/644P have been developed and manufactured according to the most

stringent requirements of the international standard ISO-TS-16949. This data sheet contains

limit values extracted from the results of extensive characterization (Temperature and Voltage).

The quality and reliability of the ATmega164P/324P/644P have been verified during regular

product qualification as per AEC-Q100 grade 1 (–40°C to +125°C).

Table 2-2. Temperature Grade Identification for Automotive Products

Temperature

Temperature

Identifier

Comments

-40 ; +125

Z

Full AutomotiveTemperature Range

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 serves as analog inputs to the Analog-to-digital Converter.

Port A also serves as 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 ATmega164P/324P/644P as

listed on page 79.

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 also serves the functions of various special features of the ATmega164P/324P/644P as

listed on page 81.

5

7674F–AVR–09/09

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