摘要：  本文介绍了ATmega128RFA1主要特性， 方框图， 基本和扩展应用电路，材料清单以及RCB键控评估板方框图，电路图和材料清单.

关键字：  MCU，  收发器，  寄存器

Atmel公司的ATmega128RFA1是基于AVR增强型RISC架构的低功耗CMOS 8位MCU和2.4 GHz ISM高速数据收发器，具有135条指令，32x8通用工作寄存器，全静态操作，工作电压1.8V 到3.6V，主要用在ZigBee® / IEEE 802.15.4-2006/2003 FFD/RFD，通用2.4GHz ISM频带收发器， RF4CE， SP100， WirelessHART和IPv6 / 6LoWPAN.本文介绍了ATmega128RFA1主要特性， 方框图， 基本和扩展应用电路，材料清单以及RCB键控评估板方框图，电路图和材料清单.

The ATmega128RFA1 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture combined with a high data rate transceiver for the 2.4 GHz ISM band. It is derived from the ATmega1281 microcontroller and the AT86RF231 radio transceiver.

By executing powerful instructions in a single clock cycle， the device achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

The radio transceiver provides high data rates from 250 kb/s up to 2 Mb/s， frame handling， outstanding receiver sensitivity and high transmit output power enabling a very robust wireless communication.

ATmega128RFA1主要特性:

High Performance， Low Power AVR® 8-Bit Microcontroller

Advanced RISC Architecture

- 135 Powerful Instructions – Most Single Clock Cycle Execution

- 32x8 General Purpose Working Registers

- Fully Static Operation

- Up to 16 MIPS Throughput at 16 MHz and 1.8V

- On-Chip 2-cycle Multiplier

Non-volatile Program and Data Memories

- 128K Bytes of In-System Self-Programmable Flash

Endurance: 1000 Write/Erase Cycles @ 125°C (2000 Cycles @ 85°C)

- 4K Bytes EEPROM

Endurance: 1000 Write/Erase Cycles @ 125°C (2000 Cycles @ 85°C)

- 16K Bytes Internal SRAM

JTAG (IEEE std. 1149.1 compliant) Interface

- Boundary-scan Capabilities According to the JTAG Standard

- Extensive On-chip Debug Support

- Programming of Flash EEPROM， Fuses and Lock Bits through the JTAG interface

Peripheral Features

- Multiple Timer/Counter & PWM channels

- Real Time Counter with Separate Oscillator

- 10-bit， 330 ks/s A/D Converter; Analog Comparator; On-chip Temperature Sensor

- Master/Slave SPI Serial Interface

- Two Programmable Serial USART

- Byte Oriented 2-wire Serial Interface

Advanced Interrupt Handler

Watchdog Timer with Separate On-Chip Oscillator

Power-on Reset and Low Current Brown-Out Detector

Advanced Power Save Modes

Fully integrated Low Power Transceiver for 2.4 GHz ISM Band

- Supported Data Rates: 250 kb/s and 500 kb/s， 1 Mb/s， 2 Mb/s

- -100 dBm RX Sensitivity; TX Output Power up to 3.5 dBm

- Hardware Assisted MAC (Auto-Acknowledge， Auto-Retry)

- 32 Bit IEEE 802.15.4 Symbol Counter

- Baseband Signal Processing

- SFR-Detection， Spreading; De-Spreading; Framing ; CRC-16 Computation

- Antenna Diversity and TX/RX control

- TX/RX 128 Byte Frame Buffer

Hardware Security (AES， True Random Generator)

Integrated Crystal Oscillators (32.768 kHz & 16 MHz， external crystal needed)

I/O and Package

- 38 Programmable I/O Lines

- 64-pad QFN (RoHS/Fully Green)

Temperature Range: -40°C to 125°C Industrial

Supply voltage range 1.8V to 3.6V with integrated voltage regulators

Ultra Low Power consumption (1.8 to 3.6V) for Rx/Tx & AVR: <18.6 mA

- CPU Active Mode (16MHz): 4.1 mA

- 2.4GHz Transceiver: RX_ON 12.5 mA / TX 14.5 mA (maximum TX output power)

- Deep Sleep Mode: <250nA @ 25℃

Speed Grade: 0 – 16 MHz @ 1.8 – 3.6V

ATmega128RFA1应用:

ZigBee® / IEEE 802.15.4-2006/2003 – Full And Reduced Function Device (FFD/RFD)

General Purpose 2.4GHz ISM Band Transceiver with Microcontroller

RF4CE， SP100， WirelessHART， ISM Applications and IPv6 / 6LoWPAN

图1.ATmega128RFA1方框图

图2.ATmega128RFA1基本应用电路

基本应用电路材料清单:

图3.ATmega128RFA1扩展应用电路

RCB键控评估板

This application note provides a detailed hardware description for the individual function blocks of the RCB Key Remote Control (KeyRemote) board. The KeyRemote is used in conjunction with an Atmel® RCB in order to evaluate remote control applications.

RCB键控评估板主要特性:

Connector interface to adapt various radio controller boards (RCB)

RCB battery powered， hand-held evaluation， and development platform

25 keys

5 LEDs

128 x 32 graphic display

Analog， three-axis acceleration sensor

980nm IR transmitter

RS232 and JTAG interfaces

图4.RCB评估板方框图

图5.RCB键控评估板外形图

图6.RCB键控评估板电路图

RCB键控评估板材料清单: