Freescale公司的MC12311是高度集成高性價比的系統(tǒng)級封裝(SiP)1GHz內(nèi)無線節(jié)點解決方案,集成了FSK, GFSK, MSK或OOK調(diào)制的收發(fā)器和低功耗HCS08 8位9S08QE32 MCU, RF收發(fā)器工作在315 MHz, 433 MHz, 470 MHz, 868 MHz, 915 MHz, 928 MHz和955 MHz無許可證ISM頻段, 1.2 kbps時的靈敏度 -120 dBm,可編程輸出功率-18 到+17 dBm,工作電壓1.8V-3.6V,并帶穩(wěn)壓器,主要用在自動讀表,無線傳感器網(wǎng)絡(luò),家庭和建筑物自動化,無線告警和安全系統(tǒng),工業(yè)監(jiān)視和控制,無線MBUS標準(EN13757-4:2005).本文介紹了MC12311主要特性,簡化方框圖和RF收發(fā)器與MCU方框圖,典型應(yīng)用電路圖以及MC12311 開發(fā)平臺主要特性,方框圖,電路圖,材料清單和PCB元件布局圖.

The MC12311 is a highly-integrated, cost-effective, system-in-package (SIP), sub-1GHz wireless node solution with an FSK, GFSK, MSK, or OOK modulation-capable transceiver and low-power HCS08 8-bit microcontroller. The highly integrated RF transceiver operates over a wide frequency range including 315 MHz, 433 MHz, 470 MHz, 868 MHz, 915 MHz, 928 MHz, and 955 MHz in the license-free Industrial, Scientific and Medical (ISM) frequency bands. This configuration allows users to minimize the use of external components.

MC12311應(yīng)用:

The MC12311 is targeted for the following low-power

wireless applications:

• Automated Meter Reading

• Wireless Sensor Networks

• Home and Building Automation

• Wireless Alarm and Security Systems

• Industrial Monitoring and Control

• Wireless MBUS Standard (EN13757-4:2005)

Freescale supplements the MC12311 with tools and software that include hardware evaluation and development boards, software development IDE and applications, drivers, custom PHY usable with Freescale’s IEEE 802.15.4 compatible MAC, SMAC and an available wireless MBUS solution.

 

 

圖1.MC12311簡化方框圖

MC12311主要特性:

• RF Transceiver Features

— High Sensitivity: down to -120 dBm at 1.2 kbps

— High Selectivity: 16-tap FIR Channel Filter

— Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm, 80 dB Blocking Immunity, no Image Frequency response

— Low current: Rx = 16mA, 100nA register retention

— Programmable Pout : -18 to +17 dBm in 1 dB steps

— Constant RF performance over voltage range of chip

— FSK bit rates up to 300 kbps

— Fully integrated synthesizer with a resolution of 61 Hz

— FSK, GFSK, MSK, GMSK and OOK modulations

— Built-in Bit Synchronizer performing Clock recovery

— Incoming Sync Word Recognition

— Automatic RF Sense with ultra-fast AFC

— Packet engine with CRC, AES-128 encryption and 66-byte FIFO

— Built-in temperature sensor and Low battery indicator

— 32 MHz crystal oscillator clock source

• 9S08QE32 MCU Features

— 8-Bit HCS08 Central Processor Unit (CPU) with CPU clock rate up to:

– 50.33 MHz at 3.6 V to 2.4V

– 40 MHz at 2.4V to 2.1V

– 20 MHz at 2.1V to 1.8V

— HC08 instruction set with added BGND instruction

— Support for up to 32 interrupt/reset sources

— 32 KB Flash and 2 KB RAM

— Low power modes (Wait plus Stop2 and Stop3 modes)

— Dedicated serial peripheral interface (SPI) connected internally to sub-1 GHz transceiver

— Multiple clock source options

– Internal clock generator (ICG) with 243 kHz oscillator that has +/-0.2% trimming resolution and +/-0.5% deviation across voltage.

– Startup oscillator of approximately 8 MHz

– External crystal or resonator

– External source from modem clock for very high accuracy source or system low-cost option

— In-circuit debug and FLASH programming available via on-chip background debug module (BDM)

— System protection features

– Programmable low voltage interrupt (LVI)

– Optional watchdog timer (COP)

– Illegal opcode detection

— Peripherals

– ADC — 10-channel, 12-bit resolution; 2.5 ms conversion time; automatic compare function; 1.7 mV/°C temperature sensor; internal bandgap reference channel; operation in stop3; fully functional from 3.6 V to 1.8 V

– ACMPx — Two analog comparators with selectable interrupt on rising, falling, or either edge of comparator output; compare option to fixed internal bandgap reference voltage; outputs can be optionally routed to TPM module; operation in stop3

– SCIx — Two serial communications interface modules with optional 13-bit break. Full duplex non-return to zero (NRZ); LIN master extended break generation; LIN slave extended break detection; wake on active edge[!--empirenews.page--]

– IIC — One IIC; up to 100 kbps with maximum bus loading; multi-master operation; programmable slave address; interrupt driven byte-by-byte data transfer; supports broadcast mode and 10-bit addressing

– TPMx — One 6-channel (TPM3) and two 3-channel (TPM1 and TPM2); selectable input capture, output compare, or buffered edge- or center-aligned PWM on each channel;

– RTC — (Real-time counter) 8-bit modulus counter with binary or decimal based prescaler; external clock source for precise time base, time-of-day, calendar or task scheduling functions; free running on-chip low power oscillator (1 kHz) for cyclic wake-up without external components; runs in all MCU modes

— KBI — Two 8-bit port keyboard interrupt modules

— Input/Output

– Up to 33 GPIO including dedicated GPIO supporting transceiver

– 13 KBI interrupts with selectable polarity

– Hysteresis and configurable pullup device on all input pins; Configurable slew rate and drive strength on all output pins.

• 1.8 V to 3.6 V operating voltage with on-chip voltage regulators

• Temperature range of –40 ℃ to 85 ℃

• 60-pin LGA (8x8 mm) Package

Freescale will support the MC12311 platform with several software solutions:

• SMAC (Simple Media Access Controller) - This codebase provides simple communication and test apps based on drivers/PHY utilities available as source code. This environment is useful for hardware and RF debug, hardware standards certification, and developing proprietary applications.

• IEEE 802.15.4 MAC with custom PHY layer - The Freescale MAC is a robust, mature codebase useful for developing networking solutions. Freescale is implementing an IEEE 802.15.4 MAC-compatible custom sub-1 GHz PHY template that can be used across different frequency bands. This capability allows users to build powerful networking solutions on a known, stable codebase.

• Wireless MBUS stack - Freescale is porting an existing wireless MBUS codebase to the MC12311 platform which will be available through an external partner.

 

 

圖2.MC12311 收發(fā)器框圖

 

 

圖3.MC12311 MCU框圖

 

 

圖4.MC12311典型應(yīng)用電路圖

MC12311 開發(fā)平臺

The MC12311 development platform is a highly-integrated, cost-effective, system-in-package (SIP), sub-1GHz wireless node solution with an FSK, GFSK, MSK, or OOK modulation-capable transceiver and low-power QE32 8-bit microcontroller. The highly integrated RF transceiver operates over a wide frequency range including 315 MHz, 433 MHz, 470 MHz, 868 MHz, 915 MHz, 928 MHz, and 955 MHz in the license-free Industrial, Scientific and Medical (ISM) frequency bands.

The MC12311 development platform is built around the concept of having a single daughter card (12311-MRB) that contains the MC12311 IC and all necessary I/O connections for use as a self-contained module or for connection to an application motherboard like the TWR-RF board.

 

 

圖5.MC12311 開發(fā)平臺12311-MRB外形圖

Features of the MC12311 development platform include:

• Based on Freescale’s low-cost MC12311 sub-1GHz wireless node solution with an FSK, GFSK, MSK, or OOK modulation-capable transceiver and low-power QE32 8-bit microcontroller, and a functional set of MCU peripherals into a 60-pin LGA package

• Reference design area with small footprint, low cost RF node

— Power Amplifier Output

— Unbalance input/output port

— Flexible RF-Front End for different bands operation

— Programmable output power from -18 dBm to +17 dBm in 1dB steps

— High Sensitivity: down to -120dBm at 1.2kbps

• 32 MHz reference oscillator

• BDM serial MCU debug port

• Optional secondary 32.768 kHz crystal oscillator for accurate low power timing

• Master reset switch

• Full power regulation and management

• 12311-MRB board provides

— Required circuitry for MC12311 - crystals and RF circuitry including SMA connectors for Power Amplifier Output and Input/Output RF port

— Local power supply regulation

— Access to all GPIO

— Standalone or daughter card use modes[!--empirenews.page--]

— BDM connector

 

 

圖6.12311-MRB 方框圖

 

 

圖7.12311-MRB電路圖

12311-MRB材料清單(所有頻率):

 

 

 

 

 

 

12311-MRB材料清單(915MHz和868MHz頻段):

 

 

12311-MRB材料清單(433MHz頻段):

 

 

 

 

圖8.12311-MRB PCB元件布局圖(頂層)