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General purpose power line modem module based on the ST7540 PLM and STM32 microcontroller
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The general purpose power line modem module is based on an ST7540 FSK power line modem transceiver and an STM32 microcontroller. The PLM module board is a fully functional communication module, with 8 programmable I/Os, a real-time clock and a Flash memory area for modem parameters and user data storage.

The firmware structure is made up of several layers, each dealing with a different feature. The application layer engine is the general interface between the user program and all the parts of the module. It deals with the communication ports, the module peripherals such as SPI, SCI, RTC, I/Os, LEDs and timing management. It is also the interface between the PLM stack and the user program. The PLM stack, itself made up of several layers, implements and manages the power line communication, manages the conflicts, timing and repetitions, the addressing, and so on.

Some features are managed directly by the application engine, and are transparent to the user, such as the RTC management or the module parameter update, as well as the module programming and configuration, which is done by particular programming or service commands managed and acknowledged directly by the application engine.

The user layer is fully customizable by using some easy to use APIs available for user application implementation. User data can be easily addressed to the PLM or to the other communication interface by simply changing the destination channel in the user data structure.

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Data Brief

Key Features

  • Communication interfaces
  • Configurable FSK power line modem interface with an embedded firmware stack for a complete power line communication management.
  • SPI and USART interfaces for module interfacing
  • Module hardware
  • Internal configurable RTC time-clock with lithium backup battery
  • Up to 8 user-configurable general purpose input/output pins
  • Programmable user data and PLM parameters Flash memory area
  • PLM communication protocol
  • Configurable PLM data link stack working model (master/slave, multimaster)
  • Unicast and broadcast data frame capability
  • CSMA/CA and repetitions management
  • Up to 100 bytes of user data payload
  • SPI, USART communication protocol
  • Programmable communication interface (SPI, SCI)
  • Embedded data, programming and service APIs
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1723: General purpose power line modem module based on the ST7540 PLM and STM32 microcontroller
1.0 271 KB

User Manual

Description Version Size
UM1573: ST7540 power line modem firmware stack
1.1 769 KB
UM1619: General purpose ST7540 power line modem module based on ST7540 PLM and STM32 microcontroller
1.0 2,747 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-IHP005V1 gerber files
1.0 105 KB

Bill of Materials

Description Version Size
1.0 52 KB

Schematic Pack

Description Version Size
STEVAL-IHP005V1 schematics
1.0 34 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STSW-IHP005 STEVAL-IHP005V1 application software setup

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-IHP005V1ActiveST7540; STM32F103CBBuy Direct99.22Distributor reported inventory date: 2016-02-06
Distributor NameRegionStockMin. order

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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