ST Microelectronics
ST7540 vs. Cypress
PSoC 5LP
Power Line Communication(PLC)
Applications
Reliable, Ready-to-Certify PLC Solution
Owner : SHIV
Cypress Confidential
Sales Training 02/262013
ST7540 Overview
ST7540 is a half duplex synchronous/asynchronous FSK modem for PLC applications featuring
Integrated power line driver with programmable voltage and current control
Single supply voltage (from 7.5V up to 13.5V)
8 programmable transmission frequencies
Programmable baud rate up to 2.4 kbps
CENELEC EN50065 (band C) and FCC (part 15) compliance
ST7540 finds application in
Home and Building Automation like Smart Plug
In-Home Display (IHD)
E-Vehicle
Smart Meter
Solar Panel
ST Micro’s ST7540
ST7540 is a reliable, non-conventional communication device that offers a high
performance/cost ratio
Owner : SHIV
Cypress Confidential
Sales Training 02/26/2013
2
Challenges Using ST7540
1. PLC systems require multiple ICs
ICs are needed for FSK Transceiver, Network Protocol, Application Firmware and other
system functions such as power measurement and DC-AC conversion
Higher # of ICs increases the # of points of failure (PoF) which reduces the system
reliability
ST7540 provides the FSK transceiver only and needs additional integration like MCU
and power measurement IC to provide desired functionality
PSoC One-Chip PLC Solution
FSK Transceiver
2. PLC devices are difficult to certify
Certification standards vary across countries and are not well defined
The standards require your customers to build complicated Network Protocol firmware
ST7540 provides only partial compliance within the standards, CENELEC EN50065
(band C) and FCC (part 15)
MCU for Network
Protocol and Application
Firmware
Additional Power Measurement IC
PSoC 5LP solves these problems
Integrates all PLC and other system functions on a single chip reducing # of PoFs
Makes customer certification easy as it is pre-tested to FCC, CENELEC and UL standards
PSoC 5LP delivers a one-chip, reliable, ready-to-certify PLC solution
PSoC 5 one-chip PLC solution
Owner : SHIV
Cypress Confidential
Sales Training 02/26/2013
3
ST7540 vs. Cypress PSoC 5LP
Feature
Ready-to-certify Design
ST7540
PSoC 5LP CY8C58LP
No
Yes
Network Protocol
None
Included
Transceiver
FSK
FSK
Data rates
2.4 kbps
2.4 kbps
Error Detection
None
8-bit CRC
Integrated microcontroller
None
32-bit ARM Cortex M3
(100 DMIPS)
No
Yes
(8- to 20-bit ADC, 8-bit DAC,
comparators, filters, opamps)
Integrate other system components
The indicated parameters are in the perceived order of importance
Owner : SHIV
Cypress Confidential
Sales Training 02/26/2013
4
Customer Objections to Adopting
Cypress PSoC 5LP over ST7540
“ST7540 is a cheaper solution”
PSoC 5LP integrates PLC and other system functions on a single chip and is pre-certified, thereby reducing time to market (TTM)
PSoC 5LP has superior power saving modes and restores device configuration to active mode on wake up
“Previous design was using ST7540” / “More familiar with ST7540”
PSoC 5LP offers an integrated microcontroller, better features and performance than the ST7540
Easy-to-use ‘Drag and Drop’ implementation on PSoC Creator and supporting training modules allows for easy migration and
lowers cost on subsequent designs
Owner : SHIV
Cypress Confidential
Sales Training 02/26/2013
5
Sales Cautions for Cypress PSoC 5LP
PSoC 5LP has 4 device families
CY8C52LP – Digital Only
CY8C54LP – Analog Lite
CY8C56LP – Performance Analog
CY8C58LP – Precision Analog
Only CY8C56LP and CY8C58LP families provide PLC functionality because of presence of dedicated Digital Filter Blocks (DFBs)
Owner : SHIV
Cypress Confidential
Sales Training 02/26/2013
6
PSoC 5LP PLC Design Win Example –
Emergency Airfield Lighting System
PSoC Value
Block Diagram
PSoC 5LP One-Chip Solution
Design Challenges
Communicate over an AC power line at 480V AC
Support 2000 units on the power line
Tx RC Filter
Passives
FSK
Modulator
2
UART
32
Tx, Rx
LEDs
Suggested Collateral
3
GPIO
ARM®
CortexTM-M3
(32-bit)
MCU
32
Line Driver
Network
Protocol
Coupling
Circuit
32
FSK
Demodulator
App Notes: PSoC 5LP PLC Solution
PLC Repeater Implementation
Training:
LP Notch
Filter Passives
Power line
PSoC® Solution
Provides PLC system that works on 480V AC line
Supports more than 64,000 units on a power line
Integrated PLC
Components
LP Notch
Filter Passives
Rx
Introduction to PSoC 5LP
Competition
ST7540 + MCU + Power Measurement IC
Emergency Airfield Lighting
System by Ross Design
Uses the PLC subsystem to
remotely manage landing lights
Owner : SHIV
Cypress Confidential
Sales Training 02/26/2013
7