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RF Remote Control

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Block Diagram - RF Remote Control

Cypress provides a portfolio of low cost, low power & high performance solutions for RF remote controllers. The solutions also provide simultaneous support for legacy IR operations. The following block diagrams illustrate a typical remote control device based on WirelessUSB-NL, Cypress’ 3rd generation 2.4 GHz radio. Please click on the MCU block to view or sample recommended MCUs.

Figure 1: Remote Control

Figure 2: Dongle/Module

Design Considerations

The advent of smart TVs is driving the demand of new features on remote controls such as non-line-of-sight (NLOS) operations, greater range, faster button response, bi-directional data support, operation at high angle (>45%), etc.  Currently, the predominant technology for TV remote controls is Infrared (IR). But low range, low data rate & line of sight constraints make IR unsuitable for meeting these new features. Support of these features necessitates the use of RF in remote control designs.

Cypress’ remote control solutions are based on enCoRe MCU & WirelessUSB RF products. Cypress' WirelessUSB technology offers an unparalleled feature set to enable superior RF performance, interference immunity, range, and maximum battery life. In addition, enCoRe MCUs feature an 8-bit RISC core with flash memory, low power and a variety of internal peripheral functions.

An enCoRe & WirelessUSB solution can support both IR & RF technologies simultaneously. It features low power (can support >100,000 button presses with single coin cell battery), reduced BOM, battery management support & operation at angles up to 60 degrees. The solution is complemented by drivers & firmware that has support for both IR & RF transmission.

Application Notes

AN15257 - Guidelines for Evaluating System Performance of Cypress WirelessUSB™ RF Products
When product designers use reference designs as a basis for their own projects, they typically modify or enhance the original designs. Unfortunately, these modifications can cause a considerable decline in performance.

AN4002 - Calculating Battery Life in WirelessUSB LS™ Systems
This application note provides guidelines for calculating expected battery life in 2-way WirelessUSB products for engineers who are familiar with these basic power management concepts.

AN4004 - Interference Mitigation Challenges and Solutions in the 2.4 to 2.5 GHz ISM Band
This application notes discusses avoiding interference using WirelessUSB.

AN5033 - WirelessUSB™ Dual Antenna Design Layout Guidelines
WirelessUSB(TM) Dual Antenna Design Layout Guidelines

AN6066 - Wireless Binding Methodologies
AN6066 discusses the general considerations for deciding on a binding methodology of devices in robust wireless systems, and also gives examples of common binding schemes, highlighting their advantages and disadvantages. It is intended for system architects, particularly those who are relatively new to wireless designs.

AN64285 - Wirelessusb™ NL Low Power Radio Recommended Usage and PCB Layout
Wireless products are now found in abundance, all around us today, and their usage continues to rapidly expand. This application note introduces the Cypress CYRF8935 device and a sample PCB design. The appendix section guides you on antenna selection process.

AN72428 - Schematic Review Checklist for WirelessUSB™ NL
AN72428 discusses the hardware considerations and recommended practices for systems that use WirelessUSB™ NL, the Cypress third generation 2.4-GHz low-power RF technology. WirelessUSB NL operates in the 2.4-GHz ISM band and delivers the next level of low-power performance on a small 4-mm × 4-mm footprint.

Development Kits/Boards

CY3631 WirelessUSB(TM) Manufacturing Test Kit
The CY3631 WirelessUSB Manufacturing Test Kit (MTK) is an automated platform that enables customers to quickly test their WirelessUSB-enabled products without the need for expensive RF test equipment.

CY3668 WirelessUSB NL Development Kit
The CY3668 WirelessUSB-NL development kit provides a generic platform for developing wireless applications based on the WirelessUSB-NL radio and enCoRe II & enCoRe V MCU devices.


Cypress wireless solutions share the unique qualities of ultra-reliable, low-power, and are optimized for wireless HID applications. The product portfolio features a rich assortment of 2.4 GHz radios & 8-bit companion MCUs.

  1. RF/Wireless for Consumer Products
    Cypress's WirelessUSB RF solutions are designed for short-range, multipoint-to-point connectivity and use 2.4 GHz ISM band. Cypress's patented WirelessUSB technology offers unparalleled feature set to enable superior RF performance, interference immunity, and maximum battery life
  2. RF Companion Microcontrollers
    Cypress offers a line of low-power, 8-bit microcontrollers that are ideal for wireless applications. The devices feature the industry's smallest 8-bit RISC core with flash memory, low power and a variety of internal peripheral functions.

Technical Articles
Software and Drivers

PSoC Creator
PSoC Creator is a state-of-the-art software development IDE combined with a revolutionary graphical design editor to form a uniquely powerful hardware/software co-design environment.

PSoC Designer
PSoC Designer is the revolutionary Integrated Design Environment (IDE) that you can use to customize PSoC to meet your specific application requirements. PSoC Designer software accelerates system bring-up and time-to-market.

WirelessUSB-NL Radio Driver
The WUSB-NL radio driver provides users with a consistent interface to the WUSB-NL radio. The driver is designed to interface with both C and assembly written applications.

Spec No: None; Sunset Owner: AMEE; Secondary Owner: PRKA; Sunset Date: 06/15/20