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COM1A1 Datasheet(PDF) 3 Page - ATMEL Corporation |
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COM1A1 Datasheet(HTML) 3 Page - ATMEL Corporation |
3 / 294 page 3 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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