原标题：ST STCOMET智能电表和动力线通信(PLC)开发方案

　　ST公司的STCOMET是集成了智能电表和动力线通信(PLC)的系统级芯片(SoC),包括PLC调制解调器(Modem),高性能应用核和计量功能,支持PRIME,G1,G3,IEEE 1901.2,METERS AND MORE®和其它窄带PLC协议指标,计量子系统适用于EN 50470-1,EN 50470-3,IEC 62053-21, IEC62053-22和IEC 62053-23.主要用在智能电表,智能电网和物联网 (IoT).本文介绍了STCOMET主要特性,框图,架构图和时钟树,参考应用电路图以及开发套件EVLKSTCOMET10-1主要特性,功能框图,和火线连接图以及主板,LCD和电源电路图,材料清单和PCB设计图.

　　The STCOMET is a device that integrates a power line communication (PLC) modem,a high-performance application core and metrology functions.

　　The PLC modem architecture has been designed to target EN50065, FCC, ARIB compliantPLC applications. Together with the application core, it enables the STCOMET to supportthe PRIME, G1, G3, IEEE 1901.2, METERS AND MORE® and other narrow band PLCprotocol specifications.

　　The metrology sub-system is suitable for EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22 and IEC 62053-23 compliant class1, class0.5 and class0.2 AC meteringapplications.

　　STCOMET主要特性:

　　 Integrated differential PLC analog front-end

　　– PGA with automatic gain control and ADC

　　– Current DAC with transmission predriver

　　– Digital transmission level control

　　– Zero crossing comparator

　　– Up to 500 kHz PLC signal bandwidth

　　 Integrated dual line driver

　　– 14 V p-p single ended, 28 V p-p differentialoutput range

　　– Very high linearity for EMC compliance

　　– Externally configurable amplifier topology

　　– 1 Arms max. current

　　– Embedded overtemperature protection

　　– Suitable for all PLC signals up to 500 kHz

　　 Fully reprogrammable real-time engine (RTE)modem for PLC standards up to 500 kHz

　　 High accuracy metering front-end

　　– 3 independent 24-bit ΣΔ ADC channels

　　– 3.6 kHz bandwidth

　　– Dedicated DSP for turnkey calculation ofmetrology parameters

　　– Direct access to 24-bit ΣΔ data

　　 Integrated application core: ARM® 32-bitCortex™-M4F CPU

　　– 96 MHz maximum frequency

　　– 8-channel direct memory access controller

　　– 8-region memory protection unit

　　– Serial wire and JTAG interfaces

　　– Cortex-M4 Embedded Trace Macrocell™

　　– Up to 86 multiplexed GPIOs

　　– 11 timers

　　– 1 flexible CRC calculation unit

　　– 5 USARTs (ISO 7816 compliant), 5 SPI,3 I2C

　　– 12-bit general purpose ADC with6 channels

　　 Cryptographic engine

　　– AES 128/192/256 engine

　　– True random number generator

　　 Memories

　　– 640 kB or 1 MB of embedded Flash

　　– 128 kB of embedded SRAM

　　– 8 kB of embedded shared RAM

　　– Flexible static memory controller

　　 Clock management

　　– 24 MHz external crystal for system clockwith internal QFS synthesizer

　　– 32.768 kHz external crystal for RTC

　　 Power management

　　– 3.3 V and 8 - 18 V external supply voltages

　　– 1.2 V and 5 V integrated linear regulators

　　– Normal and low power modes

　　 Real-time clock (RTC)

　　– VBAT supply with battery health monitoringfor RTC and backup registers

　　 -40 ℃ to +85 ℃ operating temperature range

　　STCOMET应用:

　　 Smart metering, smart grid and “Internet ofThings” applications

　　 Compliant with EN 50470-1, EN 50470-3, IEC62053-21, IEC 62053-22 and IEC 62053-23

　　 Compliant with CENELEC, FCC, ARIBregulations

　　图1.STCOMET基本框图

　　图2.STCOMET架构图

　　图3.STCOMET时钟树

　　图4.STCOMET参考应用电路图

　　开发套件EVLKSTCOMET10-1

　　The EVLKSTCOMET10-1 is a development kit for the STCOMET platform, exploiting the performance capability of the full-feature STCOMET10 device. The STCOMET10 is a single device integrating a flexible power line communication (PLC) modem with a fully embedded analog front end (AFE) and a line driver, a high performance 3-channel metrology function and a Cortex™-M4 application core.

　　The kit is made of three modules: the STCOMET main board, the LCD module and the power supply board based on the VIPER26H.

　　With this development kit, it is possible to evaluate a complete single phase smart meter with PLC connectivity. The performance of the metering and application functions could be evaluated along with the PLC transmitting and receiving performance.

　　The PLC line coupling interface is designed to allow the STCOMET device to transmit and receive on the AC mains line using any narrow-band PLC modulation (single carrier or OFDM) up to 500 kHz, mainly for automatic meter reading (AMR) applications.

　　The default configuration of the PLC line coupling targets the G3-PLC (ITU G.9903) and PRIME (ITU G.9904) CENELEC A-band protocol standards. With a few BOM modifications, the STCOMET development kit can be adjusted to fit other narrow-band PLC protocols in CENELEC A-band or FCC band (e. g.: S-FSK IEC61334-5-1, IEEE 1901.2, G3-PLC FCC, METERS AND MORE).

　　If necessary, a specific customer’s module can be designed and placed instead of the LCD module, for a different peripherals configuration.As it can be seen from the EVLKSTCOMET10-1 picture, a special effort has been made to create the development kit compact and optimized to fit the size of a real meter.

　　The EVLKSTCOMET10-1 is suitable for the evaluation of the complete STCOMET platform. Featuring the full set STCOMET10 chip, the EVLKSTCOMET10-1 demonstrates at the same time all the functions and performance of the STCOM chips.

　　Please check for the EVLKSTCOMET10-1 hardware documentation, evaluation software and firmware libraries at st.com/powerline. For specific software or firmware releases, you may need to contact directly the STMicroelectronics sales office.

　　开发套件EVLKSTCOMET10-1主要特性:

　　Full single phase meter development kit based on the STCOMET smart meter system-on-chip

　　Complete power line communication (PLC) reference design suitable to implement several PLC protocols in CENELEC, ARIB and FCC bands

　　Metering in compliance with EN 50470-1, EN 50470-3, IEC 62053-2x, up to class0.2

　　Up to 3 independent measurement channels for mains voltage and input/output current

　　Two LEDs for active and reactive energy signaling

　　Two tamper buttons

　　ARM®32-bit Cortex™-M4F CPU embedded in the STCOMET device for system management and application host controller

　　86 available GPIOs, general purpose LEDs and buttons and LCD on strip module

　　Digital connector for 3-phase metering extension with the EVALSTPM34

　　Relay driving circuit for unipolar and bipolar relay based on ST L2293Q monolithic driver device

　　Off-line switching mode power supply based on ST VIPER26H isolated flyback reference design (+ optional 8 - 15 V input available for laboratory tests)

　　JTAG debug over isolated USB host interface for connecting to a PC (J-Link OB)

　　Dual UART over isolated USB host interface for connecting to a PC

　　Suitable for CENELEC EN50065 and FCC part 15 compliant applications.

　　图5.EVLKSTCOMET10-1外形图

　　EVLKSTCOMET10-1主要特性:

　　 Full single phase meter development kit basedon the STCOMET smart meter system-on-chip

　　 Complete power line communication (PLC)reference design suitable to implement severalPLC protocols in CENELEC, ARIB and FCCbands

　　 Metering in compliance with EN 50470-1,EN 50470-3, IEC 62053-2x, up to class0.2

　　 Up to 3 independent measurement channelsfor mains voltage and input/output current

　　 Two LEDs for active and reactive energysignaling

　　 Two tamper buttons

　　 ARM® 32-bit Cortex™-M4F CPU embedded inthe STCOMET device for system managementand application host controller

　　 86 available GPIOs, general purpose LEDsand buttons and LCD on strip module

　　 Digital connector for 3-phase meteringextension with the EVALSTPM34

　　 Relay driving circuit for unipolar and bipolarrelay based on ST L2293Q monolithic driverdevice

　　 Off-line switching mode power supply based onST VIPER26H isolated flyback referencedesign (+ optional 8 - 15 V input available forlaboratory tests)

　　 JTAG debug over isolated USB host interfacefor connecting to a PC (J-Link OB)

　　 Dual UART over isolated USB host interfacefor connecting to a PC

　　 Suitable for CENELEC EN50065 and FCC part15 compliant applications

　　图6.EVLKSTCOMET10-1功能框图

　　图7.EVLKSTCOMET10-1和AC火线连接图