英飞凌PMA7110 FSK RF发送方案

英飞凌(Infineon)公司的PMA7110 是嵌入了8051微控制器的FSK/ASK RF发送器,具有低频125kHz ASK接收器和FSK/ASK 315/434/868/915 MHz发送器以及先辈进的功率控制系统,能为各种工业,消费类电子和汽车电子应用提供单片解决方案. PMA7110的工作电压为1.9V-3.6V.本文介绍了PMA7110的主要特性,方框图以及采用PMA7110的遥控设计案例.

PMA7110 RF Transmitter IC with embedded 8051 Microcontroller, LF 125kHz ASK Receiver and FSK/ASK 315/434/868/915 MHz Transmitter.
The PMA7110 is a low power wireless FSK/ASK Transmitter with embedded microcontroller, which offers a single chip solution for various industrial, consumer and automotive applications in frequency bands 315/434/868/915 MHz. With its highly integrated mixed signal peripherals, PMA7110 requires only few external components. The operating voltage range is 1.9 - 3.6 V.

The PMA7110 contains
8051 based microcontroller
Advanced power control system to minimize power consumption
RF transmitter
LF receiver
Multifunctional interface for external Sensors and embedded temperature and
battery voltage sensor
Measurement via embedded temperature and voltage sensor, reading signal from analog inputs (e.g. from external analog sensor) are performed under software control, so that the microcontroller can format and prepare this data for the RF transmission.
An intelligent power control system enables the build of ultra low power applications by
using powersaving modes.
The integrated microcontroller is instruction set compatible to the standard 8051
processor. It is equipped with various peripherals (e.g. a hardware Manchester/BiPhase
Encoder/Decoder and CRC Generator/Checker) enabling an easy implementation of
customer-specific applications.
The low power consumption FSK/ASK Transmitter for 315/434/868/915 MHz frequency
bands contains a fully integrated VCO, a PLL synthesizer, an ASK/ FSK modulator and
an efficient power amplifier. Fine tuning of the center frequency can be done by an onchip
capacitor bank.
To store the microcontroller application program code and its unique ID-Number, an onchip FLASH memory is integrated. Additional ROM storage is provided for the ROM
library functions covering standard tasks required by various applications.

PMA7110主要特性:
Supply voltage range from 1.9 V up to 3.6 V
Operating temperature range -40 to +85 °C
Low supply current
Temperature sensor
Battery voltage measurement
Integrated RF- transmitter for ISM band 315/434/868/915 MHz
Selectable transmit power 5/8/10 dBm into 50 Ohm load
Transmit data rates up to 32kbit/s or 64kchips/s in manchester code
FSK/ASK modulation capability
Frequency deviation up to 100 kHz in FSK mode
Fully integrated VCO and PLL synthesizer
Crystal oscillator tuning on chip
LF receiver with input signal amplitude of min. 0.25 mVpp
LF receiver data rate from 2000 bit up to 4000 bit (Manchester/BiPhase coded)
8051 instruction set compatible microcontroller (cycle-optimized)
6 kbyte Flash Code and 2x128 bytes flash data memory (for user-application like
EEPROM emulation)
12 kbyte ROM (for ROM library functions)
256 bytes RAM (128 bytes configurable to keep content in Power Down mode), 16
bytes XData memory (supplied in PowerDown)
I2C bus interface
SPI bus interface
10 free programmable bidirectional GPIO pins with on chip pull-up/down resistors
4 independent 16 bit timers
10bit ADC with 3 pair differential channels (e.g. as IO for external sensors)
Wakeup from POWER DOWN state using the Interval Timer, the LF receiver or external wakeup sources connected via a GPIO
Manchester/BiPhase encoder and decoder
Hardware CRC generator
Pseudo Random Number Generator
Watchdog timer
on chip debugging via I2C interface

应用:
Remote control systems for industrial and consumer applications
Security- and Alarm-systems
Home automation systems
Automatic meter reading
Active Tagging



图1. PMA7110方框图



图2.采用PMA7110的遥控设计案例