ATmega88-15AT datasheet(4/340 Pages) ATMEL

4 / 340 page

7530H–AVR–02/09

ATmega48/88/168 Automotive

The AVR core combines a rich instruction set with 32 general purpose working registers. All the

32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent

registers to be accessed in one single instruction executed in one clock cycle. The resulting

architecture is more code efficient while achieving throughputs up to ten times faster than con-

ventional CISC microcontrollers.

The ATmega48/88/168 provides the following features: 4K/8K/16K bytes of In-System Program-

mable Flash with Read-While-Write capabilities, 256/512/512 bytes EEPROM, 512/1K/1K bytes

SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible

Timer/Counters with compare modes, internal and external interrupts, a serial programmable

USART, a byte-oriented 2-wire Serial Interface, an SPI serial port, a 6-channel 10-bit ADC (8

channels in TQFP and QFN packages), a programmable Watchdog Timer with internal Oscilla-

tor, and five software selectable power saving modes. The Idle mode stops the CPU while

allowing the SRAM, Timer/Counters, USART, 2-wire Serial Interface, SPI port, and interrupt sys-

tem to continue functioning. The Power-down mode saves the register contents but freezes the

Oscillator, disabling all other chip functions until the next interrupt or hardware reset. In

Power-save mode, the asynchronous timer continues to run, allowing the user to maintain a

timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the

CPU and all I/O modules except asynchronous timer and ADC, to minimize switching noise dur-

ing ADC conversions. In Standby mode, the crystal/resonator Oscillator is running while the rest

of the device is sleeping. This allows very fast start-up combined with low power consumption.

The device is manufactured using Atmel’s high density non-volatile memory technology. The

On-chip ISP Flash allows the program memory to be reprogrammed In-System through an SPI

serial interface, by a conventional non-volatile memory programmer, or by an On-chip Boot pro-

gram running on the AVR core. The Boot program can use any interface to download the

application program in the Application Flash memory. Software in the Boot Flash section will

continue to run while the Application Flash section is updated, providing true Read-While-Write

operation. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a

monolithic chip, the Atmel ATmega48/88/168 is a powerful microcontroller that provides a highly

flexible and cost effective solution to many embedded control applications.

The ATmega48/88/168 AVR is supported with a full suite of program and system development

tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emu-

lators, and Evaluation kits.

2.2

Automotive Quality Grade

The ATmega48-15AZ, ATmega88-15AZ and ATmega168-15AZ have been developed and man-

ufactured according to the most stringent requirements of the international standard

ISO-TS-16949 grade 1. This data sheet contains limit values extracted from the results of exten-

sive characterization (Temperature and Voltage). The quality and reliability of the

ATmega48-15AZ, ATmega88-15AZ and ATmega168-15AZ have been verified during regular

product qualification as per AEC-Q100.

As indicated in the ordering information paragraph (see “Ordering Information” on page 325), the

products are available in three different temperature grades, but with equivalent quality and reli-

ability objectives. Different temperature identifiers have been defined as listed in Table 2-1.

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