ATMEGA48-15AZV Ver la hoja de datos (PDF) - Atmel Corporation

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ATMEGA48-15AZV

8-bit Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

Atmel ATmega48/88/168 Automotive

Table 2-1. Temperature Grade Identification for Automotive Products

Temperature

Temperature

Identifier

Comments

-40 ; +85

T

Similar to Industrial Temperature Grade but with Automotive

Quality

-40 ; +105

T1

Reduced Automotive Temperature Range

-40 ; +125

Z

Full AutomotiveTemperature Range

2.3 Comparison Between ATmega48, ATmega88, and ATmega168

The ATmega48, ATmega88 and ATmega168 differ only in memory sizes, boot loader support,

and interrupt vector sizes. Table 2-2 summarizes the different memory and interrupt vector sizes

for the three devices.

Table 2-2. Memory Size Summary

Device

Flash

EEPROM

ATmega48

4K Bytes

256 Bytes

ATmega88

8K Bytes

512 Bytes

ATmega168

16K Bytes

512 Bytes

RAM

512 Bytes

1K Bytes

1K Bytes

Interrupt Vector Size

1 instruction word/vector

1 instruction word/vector

2 instruction words/vector

ATmega88 and ATmega168 support a real Read-While-Write Self-Programming mechanism.

There is a separate Boot Loader Section, and the SPM instruction can only execute from there.

In ATmega48, there is no Read-While-Write support and no separate Boot Loader Section. The

SPM instruction can execute from the entire Flash.

2.4 Pin Descriptions

2.4.1 VCC

Digital supply voltage.

2.4.2 GND

Ground.

2.4.3

Port B (PB7..0) XTAL1/

XTAL2/TOSC1/TOSC2

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.

Depending on the clock selection fuse settings, PB6 can be used as input to the inverting Oscil-

lator amplifier and input to the internal clock operating circuit.

5

7530J–AVR–03/12

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