STEVAL-IHP005V1 General purpose power line modem module based on the ST7540 PLM and STM32 microcontroller Databrief 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 application layer engine is the general interface parameters Flash memory area between the user program and all the parts of the module. It deals with the communication ports, PLM communication protocol the module peripherals such as SPI, SCI, RTC, Configurable PLM data link stack working I/Os, LEDs and timing management. It is also the model (master/slave, multimaster) interface between the PLM stack and the user Unicast and broadcast data frame program. The PLM stack, itself made up of capability several layers, implements and manages the CSMA/CA and repetitions management power line communication, manages the conflicts, Up to 100 bytes of user data payload timing and repetitions, the addressing, and so on. SPI, USART communication protocol Some features are managed directly by the Programmable communication interface application engine, and are transparent to the (SPI, SCI) user, such as the RTC management or the module parameter update, as well as the module Embedded data, programming and service programming and configuration, which is done by APIs particular programming or service commands RoHS compliant managed and acknowledged directly by the application engine. Description The user layer is fully customizable by using some The general purpose power line modem module easy to use APIs available for user application is based on an ST7540 FSK power line modem implementation. User data can be easily transceiver and an STM32 microcontroller. The addressed to the PLM or to the other PLM module board is a fully functional communication interface by simply changing the communication module, with 8 programmable destination channel in the user data structure. 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 August 2012 Doc ID 023541 Rev 1 1/6 www.st.com 6 3 B 87 (3 3 B1 9V 9F 8 57 3, 3 B1 567 7 B2 0& 69V 9 &/ 5 %8 +(50 9V 7 &/ 5 7 5 5 B 5 9 & 7( 5(* 7 7( 3 & < < , & , & &2 & 1 1 Schematic diagram STEVAL-IHP005V1 1 Schematic diagram Figure 1. PLM schematic diagram .. 5 5 & 9B9 )) 5 5 S S 5 5 5 5 .. 5 5 )) )) S S .. 5 5 5 5 & & S S 5 5 )) 76 % 76% & & Q Q & & S)) S & 9B9 9 )) & & ) X) X X X )) Q)) Q & & S S )) )) )) Q Q & & Q Q X X & 9B9 ++ X X F V V ,1 76 67 H QVH , 87 2 )) 55 7 7 66 )) X X & & S S 5 5 & B3 B 7 7 7 /. 2 , )) 6 & & S S 5 5 5 5 )) ) ) 7 5(*B 5 7 7 2B./& & & X X )) ++ X X & & Q Q & & 9 9 00 5 5 Q Q 9 6 6 % % 0 1/ 1 1 &21&21 - V 2/6 Doc ID 023541 Rev 1 & & 5 5 / / 5 5 - - & & / / & & & & ) ) 1 1 0 0 60 7 60 7 & & 0+ 0+ 7 7 7575 2 2 & & & & 5 5 8 8 & & & & 5 5 7 7 *1 7 %8 +(50 &/5 &5 0, : 5 5 1010