STEVAL-IHP005V1 Datasheet, PDF (1/6 Pages) STMicroelectronics – Unicast and broadcast data frame capability

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
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
Description
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.
August 2012
Doc ID 023541 Rev 1
1/6
www.st.com
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