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R/C Models and Toys | Cypress Semiconductor

Block Diagram

Cypress provides a portfolio of wireless solutions to meet the needs of Radio Controlled (R/C) hobby grade models and R/C toys. The following block diagrams illustrate Cypress’ solutions using the WirelessUSB 2.4GHz Transceivers and PSoC / enCoRe MCUs. The diagram also illustrates functionality provided by various blocks / components which are part of the solution.

Figure 1: For R/C hobby grade model or R/C toy

Figure 2: For  remote controller

The tables below provide details regarding functionality available on various devices and can be used as a starting point to identify which device suits your needs.

2.4GHz Transceiver Portfolio


32/64 bit PN code

Max TX +4dBm


R/C hobby grade models and high end R/C toys which need DSSS
(Supports up to 100m range without external PA

Pin out available to control external PA)

WirelessUSB-LP Star

32 bit PN code

Max TX 0dBm

  R/C toys which need DSSS
(Support up to 50m range without external PA)

Max TX 0dBm


R/C toys which need ~10m range
(Low power consumption and low cost radio)

PSoC / enCoRe MCU Portfolio



Single chip solutions for R/C hobby grade models and high end R/C toys

Up to 32KB

Up to 2KB


Using timers


    MCU with larger flash to support larger protocols for R/C models and R/C toys

Up to 16KB

Up to 1KB



  Cost competitive R/C toys which need PWM, ADC etc.

Up to 8KB

Up to 256 bytes



      Basic MCU for R/C toys

Cypress also provides single chip solutions which integrate MCU and wireless 2.4GHz radio. These are part of the Programmable-Radio-On-a-Chip family:

Design Considerations

Radio-controlled (or R/C) models are self-powered model cars, trucks, planes, boats etc. that can be controlled from a distance using a specialized transmitter. R/C models are commonly grouped into grades as follows:

Hobby grade models
  • Have superior performance, better handling, longer life
  • Have accessories / upgrades available for several years after initial manufacturing
  • Often used in professional events
  • Available in easy to assemble kits or as “Ready-To-Run” (RTR) models requiring minimum to no assembly at all
Toys grade models or R/C Toys
  • Performance and lifespan varies with price
  • Pre-assembled and bought off the shelf
  • Cheaper and easier to operate than hobby grade models
Key design considerations for R/C models and high end R/C toys with respect to radios are as follows:
  • Higher range (distance between remote and model) for outdoor use
  • Minimizing crashes by avoiding interference from other devices
  • Prevention of cross talk when multiple models are operated within transmission range of each other
  • Avoiding multi-path interference (reflected signal fading) and polarization blind spots (signal loss when antenna is directly pointed at transmitter)
Cypress’ WirelessUSB products are built to suit these needs:
  • WirelessUSB-LP has a maximum TX power of +4dBm and an inbuilt Low Noise Amplifier enabling higher range (~100m). Moreover WirelessUSB-LP has a dedicated pin for easy control of external power amplifiers
  • Sub-1GHz bands are getting crowded and more susceptible to interference, WirelessUSB devices operate in the 2.4GHz ISM band
  • DSSS and channel hopping ensure best-in-class interference immunity and superior co-location capability; leading to lower chances of cross talk between models and fewer crashes
  • Use of multiple WirelessUSB transceivers on model or car with different antenna orientations eliminates multi-path interference and polarization blind spots
  • WirelessUSB-NL radio provides channel hopping based interference avoidance and ultra low power consumption, enabling low cost R/C toys manufacturers to get good performance at competitive prices.

Together with this portfolio of radios Cypress also provides Programmable System-on-Chip (PSoC) devices which have inbuilt analog blocks like Analog to Digital Convertors (ADCs), Digital to Analog Convertors (DACs), Pulse Width Modulators (PWMs), Comparators etc. These are ideal for use on the R/C model or R/C toy side to handle functionality like motor control, radio control etc. Cypress also provides the low power enCoRe series of MCUs which can be used on R/C toys or remote controller side.

Cypress’ WirelessUSB radios, PSoCs and enCoRe MCUs provide a complete solution to suit the needs of any R/C model or R/C toys manufacturer.

Application Notes

  • 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.

  • PSoC digital blocks can operate as 8-bit pulse width modulators (PWM).

  • If a WirelessUSB™ or any direct-sequence spread spectrum (DSSS) system is to be used with unique pseudo-noise (PN) codes, an assessment should be done of the code’s auto-correlation properties. This Application Note explains about assessing the quality of a given PN code relative to another, because it is important in choosing a code appropriate for an application.

  • 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.

  • This application notes discusses avoiding interference using WirelessUSB.

  • AN43353 describes how the 16-bit Timer User Module in enCoRe V can be leveraged to build a PWM using the part. The PSoC® Designer project accompanying this application note discusses the method of implementation.

  • AN48399 provides guidelines for PCB layout design and manufacture of the WirelessUSB™ LP/LPstar transceiver chip. These recommendations help in saving time and money in the development of an integrated wireless solution, by avoiding costly layout changes late in the design cycle. There is also an increased robustness through reduction in power supply noise, receiver sensitivity degradation, crystal pulling, and antenna detuning.

  • AN5033 describes the guidelines for the antenna design and in particular, addresses the design of an integrated printed trace wiggle antenna implementation on a reference printed circuit board (PCB).

  • AN54181 introduces you to PSoC® 3, an 8051-based programmable system-on-chip. It describes the PSoC 3 architecture and development environment, and shows you how to create a simple design using PSoC Creator, the development tool for PSoC 3. This application note also guides you to more resources for in-depth learning about PSoC 3 as well as PSoC in general.

  • 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.

  • 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 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.

  • AN75320 introduces you to PSoC® 1, an 8-bit processor with programmable digital and analog blocks that enable implementation of custom functions.

Development Kits/Boards

Code Examples

Technical Articles


Cypress wireless solutions share the qualities of best-in-class interference immunity, superior co-location capability and longer range. Cypress also offers the PSoC devices and an assortment of companion MCUs (enCoRe series).
  1. RF/Wireless for Consumer Products
    Cypress's WirelessUSB RF solutions are designed for 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.
  3. Programmable System-on-Chip
    PSoC® is a true programmable embedded system-on-chip integrating configurable analog and digital peripheral functions, memory and a microcontroller on a single chip. And now our breakthrough new PSoC 3and PSoC 5 architectures extend the world’s only programmable embedded system design platform, shattering your design limitations.

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.