基于MC1321x系列设计的2.4GHz ZigBee开发方

本文介绍了MC1321x系列主要特性,方框图, 802.15.4标准调制解调器方框图和MCU(HCS08, Version A)方框图,以及13213-网络协调板(NCB)和13213-传感器参考板(SRB)电路图.

Freescale 公司的MC1321x系列是第二代ZigBee平台,集成了低功耗2.4GHz RF收发器和8位MCU,能实现点对电连接到完整的ZigBee mesh网络,是高性价比的完整解决方案.RF收发器和标准802.15.4兼容,工作在2.4 GHz ISM频带,包括有低噪音放大器,1mW输出功率,带VCO的PA,发送/接收开关,电源稳压以及全扩展频谱编码和译码.MCU具有HCS08 Version A特性,并提供多达60KB的闪存和4KB的RAM.

MC1321x系列主要特性:

General Platform Features

• 802.15.4 Standard compliant on-chip transceiver/modem

— 2.4GHz

— 16 selectable channels

— Programmable output power

• Multiple power saving modes

• 2V to 3.4V operating voltage with on-chip voltage regulators

• -40℃ to +85℃ temperature range

• Low external component count

• Supports single 16 MHz crystal clock source operation or dual crystal operation

• Support for SMAC, IEEE 802.15.4 Standard-Compliant MAC, SynkroRF, BeeStack, BeeStack Consumer (ZigBee RF4CE) software solutions

• 9mm x 9mm x 1mm 71-pin LGA

Microcontroller Features

• Low voltage MCU with 40 MHz low power HCS08 CPU core

• Up to 60K flash memory with block protection and security and 4K RAM

— MC13211: 16KB Flash, 1KB RAM

— MC13212: 32KB Flash, 2KB RAM

— MC13213: 60KB Flash, 4KB RAM

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

• Dedicated serial peripheral interface (SPI) connected internally to 802.15.4 modem

• One external 4-channel (5-channel internal) 16-bit timer/pulse width modulator (TPM) module and one external 1-channel (3-channel internal) 16-bit timer/pulse width modulator module, each with selectable input capture, output capture, and PWM capability.

• 8-bit port keyboard interrupt (KBI)

• 8-channel 8-10-bit ADC

• Two independent serial communication interfaces (SCI)

• 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

• Inter-integrated circuit (IIC) interface.

• In-circuit debug and flash programming available via on-chip background debug module (BDM)

— Two comparator and 9 trigger modes

— Eight deep FIFO for storing change-of-flow addresses and event-only data

— Tag and force breakpoints

— In-circuit debugging with single breakpoint

• System protection features

— Programmable low voltage interrupt (LVI)

— Optional watchdog timer (COP)

— Illegal opcode detection

• Up to 32 MCU GPIO with programmable pullups

RF Modem Features

• Fully compliant 802.15.4 Standard transceiver supports 250 kbps O-QPSK data in 5.0 MHz channels and full spread-spectrum encode and decode

• Operates on one of 16 selectable channels in the 2.4 GHz ISM band

• -1 dBm to 0 dBm nominal output power, programmable from -27 dBm to +3 dBm typical

• Receive sensitivity of <-92 dBm (typical) at 1% PER, 20-byte packet, much better than the 802.15.4 Standard of -85 dBm

• Integrated transmit/receive switch

• Dual PA ouput pairs which can be programmed for full differential single-port or dual-port operation that supports an external LNA and/or PA.

• Three low power modes for increased battery life

• Programmable frequency clock output for use by MCU

• Onboard trim capability for 16 MHz crystal reference oscillator eliminates need for external variable capacitors and allows for automated production frequency calibration

• Four internal timer comparators available to supplement MCU timer resources

• Supports both packet data mode and streaming data mode

• Seven GPIO to supplement MCU GPIO

Software Features

Freescale provides a wide range of software functionality to complement the MC1321x hardware. There are three levels of application solutions:

• SMAC

• IEEE 802.15.4 Standard-Compliant MAC

• SynkroRF

• BeeStack

• BeeStack Consumer (ZigBee RF4CE)

MC1321x系列应用:

Applications include, but are not limited to, the following:

• Residential and commercial automation

— Lighting control

— Security

— Access control

— Heating, ventilation, air-conditioning (HVAC)

— Automated meter reading (AMR)

• Industrial Control

— Asset tracking and monitoring

— Homeland security

— Process management

— Environmental monitoring and control

— HVAC

— Automated meter reading

• Health Care

— Patient monitoring

— Fitness monitoring

• Consumer

— Human interface devices (keyboard, mice, etc.)

— Remote control

— Wireless toys

图1.MC1321x系列系统级方框图

图2. 802.15.4标准调制解调器方框图

图3. MC1321x MCU方框图 (HCS08, Version A)

图4.MC1321x系列RF参数评估电路图

图5.MC1321x系列带F天线的RF单端口电路图

MC1321x 评估套件 (EVK)

This manual provides a detailed hardware description of the MC1321xEVK which consists of a 13213-Network Coordinator Board (13213-NCB) and a 13213-Sensor Reference Board (13213-SRB).

The functionality of the 13213-NCB and 13213-SRB boards is very similar. The primary difference between the two boards revolves around the peripheral circuits, not in the reference design itself.

The 13213-NCB and 13213-SRB provide all the necessary components to evaluate and use the MC1321x solution. The 13213-NCB and the 13213-SRB are built around the Freescale MC1321x family. The MC1321x family is Freescale’s second-generation ZigBee platform which incorporates a low power 2.4 GHz radio frequency transceiver and an 8-bit microcontroller into a single 9x9x1 mm 71-pin LGA package.

The 13213-NCB and the 13213-SRB are compliant with the following standards:

• FCC standard 47 CFR, part 15, section 15.247

• ETSI EN 300-328-1

• ETSI EN 300-328-2

图6.13213-网络协调板(NCB)外形图

图7.13213-传感器参考板(SRB)外形图

图8.13213-NCB电路图(1)