November 2011

Doc ID 022170 Rev 1

1/26

AN3975

Application note

Transparent serial link over ST7590 OFDM PRIME modem

1

Introduction

Nowadays, a lot of power meter manufacturers or smart grid providers are switching from

simple networks like RS845 to more sophisticated ones like PRIME. In order to help and

inform CTMs in their evaluation phase with transition from a simple protocol to a more

sophisticated one, a transparent bridge between RS485 and PRIME would be welcomed.

Such a system could easily help to evaluate PRIME protocol in the lab and in the field.

STMicroelectronics™, as a chip manufacturer, provides a system-on-chip realizing PRIME

protocol ST7590, and the implementation of such a transparent bridge is described in this

document. A part of this application note is a zip archive file with a firmware referenced

within this document.

www.st.com