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Maxim > Design Support > Technical Documents > Application Notes > Energy Measurement & Metering > APP 5752
Keywords: omu, hpl, firmware, SoCs, systems-on-chips
APPLICATION NOTE 5752
Comparing OMU and HPL Solutions to the
78M6610+LMU
By: Yolanda Kennedy
Nov 15, 2013
Abstract: This application note provides a comparison between the single-phase OMU and HPL firmware
solutions available for the 78M6612 and 78M6613 programmable systems-on-chips (SoCs) and the new
78M6610+LMU energy measurement processor. Engineers using these previous solutions can use this
application note to help consider design conversion to the 78M6610+LMU.
Introduction
This application note provides a comparison between the single-phase OMU and HPL firmware solutions
available for the 78M6612 and 78M6613 programmable systems-on-chips (SoCs) and the new
78M6610+LMU energy measurement processor. The intended audience is an engineer already familiar
with the previous solutions who is considering to a design conversion to the 78M6610+LMU.
Terminology
SoC The 78M6612 and 78M6613 system-on-chip products from Maxim with a programmable 80515
core, a dedicated 32-bit metrology compute engine (coprocessor), and single converter analog
front-end. One or more firmware libraries are available for customer modification of application
firmware.
OMU Outlet Monitoring Unit firmware (SoC) library for monitoring of two single-phase (2-wire) AC
loads using a single line voltage and two currents.
HPL High Power Load firmware (SoC) library for monitoring any single-phase (2-, 3-wire) AC load
using two line voltage and two line current inputs.
EMP Energy Measurement Processor platform with Maxim’s single converter analog front-end.
Multiple embedded firmware options are available as different end part numbers such as the
78M6610+LMU.
LMU Load Monitoring Unit firmware on the 78M6610 with two voltage and two current sense inputs
for monitoring any single-phase input.
CLI An ASCII-based Command Line Interface protocol for use over the serial UART interface
(available with SoC and EMP platforms). Used with demonstration code.
SLIP A binary Serial Line Interface Protocol for use over the serial UART interface (available with
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