ATA5551 datasheet(3/294 Pages) ATMEL

Part #	ATA5551

Description	High Performance, Low Power Atmel AVR 8-bit Microcontroller Advanced RISC Architecture

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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9219A–RFID–01/11

Atmel ATA5505 [Preliminary]

1.

Description

The Atmel

® ATA5505 is an Atmel AVR® microcontroller with LF-RFID reader/writer front end

and LIN interface for low cost network applications.

The Atmel ATA5505 incorporates the energy-transfer circuit for supplying the transponder. It

consists of an on-chip power supply, an oscillator, and a coil driver optimized for automo-

tive-specific distances. It also includes all signal-processing circuits which are necessary to

transform the small input signal into a microcontroller-compatible signal.

The Atmel ATA5505 integrates a low-power CMOS 8-bit microcontroller based on the Atmel

AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle,

the ATA5505 achieves throughputs approaching 1 MIPS per MHz, allowing the system

designer to optimize power consumption versus processing speed.

The Atmel AVR core combines a rich instruction set with 32 general purpose working regis-

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

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

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

than conventional CISC microcontrollers.

The Atmel ATA5505 provides the following features: 16K byte of in-system programmable

Flash, 512bytes EEPROM, 512bytes SRAM, 16 general purpose I/O lines, 32 general purpose

working registers, one 8-bit timer/counter with compare modes, one 8-bit high speed

timer/counter, a universal serial interface, a LIN controller, internal and external interrupts, an

11-channel, 10-bit ADC, a programmable watchdog timer with internal oscillator, and three

software selectable power saving modes. The Idle mode stops the CPU while allowing the

SRAM, timer/counter, ADC, analog comparator, and interrupt system to continue functioning.

Power-down mode saves the register contents, disabling all chip functions until the next inter-

rupt or hardware reset. To minimize switching noise during ADC conversions, ADC noise

reduction mode stops the CPU and all I/O modules except ADC,

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

on-chip ISP Flash allows the program memory to be re-programmed in-system via an SPI

serial interface, by a conventional non-volatile memory programmer or by an on-chip boot

code running on the Atmel AVR core. The boot program can use any interface to download the

application program in the Flash memory. By combining an 8-bit RISC CPU with in-system

self-programmable Flash on a monolithic chip, the Atmel ATA5505 is a powerful microcon-

troller providing a highly flexible and cost-effective solution to many embedded control

applications.

The Atmel ATA5505 AVR is supported with a full suite of program and system development

tools including: C compilers, macro assemblers, program debuggers/simulators, in-circuit

emulators, and evaluation kits.

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