These features include racing with multiple friends, setting up free-form racing tracks using waypoints, feeling crashes through controller vibration, and the ability to collect, see and share racing data (see "Key game-play features of nRFready R/C Racing" below for more detail).

The nRFready R/C Racing reference design includes a pair of cars and controllers, four waypoints, a USB dongle, the nRFready Racing Studio PC application, as well as all required source code and hardware design files.

The cars, controllers and waypoints are all based on Nordic¹s single chip nRF24LE1 2.4 GHz RF System-on-Chip (SoC) solution. This provides both a flexible development platform with flash, and a smooth migration to Nordic's lower-cost OTP (one time programmable) variants for mass production.

The cars in the nRFready R/C Racing reference design feature continuous steering and throttle control, crash sensors, plus blinker lights and headlights that can be switched on and off from the controller. In addition, the controllers include LEDs for car battery status and force (vibration) feedback to indicate crashes. Cars can also detect when they are in close proximity to a waypoint and wirelessly send race statistics such as lap times, speed and number of crashes to the nRFready Racing Studio PC application through the supplied USB dongle.

“We see an increasing interest in our 2.4 GHz technology from the toy industry,” said Thomas Embla Bonnerud, Product Manager with Nordic Semiconductor. “This reference design enables innovative toy manufacturers to very easily take advantage of our 2.4 GHz technology to take their remote controlled toys to the next level by adding features not possible with the 27/49 MHz technologies typically employed today, and at a price point consumers around the world will find appealing.”

The nRF24LE1 is a ULP system-on-chip 2.4 GHz transceiver that enables single-chip implementation of wireless applications. The nRF24LE1¹s radio is a fully featured nRF24L01+ 2.4 GHz transceiver core including Nordic¹s proven Enhanced ShockBurst hardware link layer. It delivers true ULP operation with peak currents low enough to run on coin cell batteries.

The nRF24LE1 integrates an enhanced 8051 mixed signal MCU core featuring fewer clock cycles per instruction than legacy 8051 devices. Most instructions need just one or two clock cycles leading to an average performance improvement of 8X using the MIPS (Million Instructions Per Second) benchmark. This high performance combined with 16-kbytes of on-chip flash and 1-kbytes of SRAM ensures the processing platform is powerful enough to run both the RF protocol stack and application layer with ease.

A wide range of peripherals and power saving modes support the RF protocol stack. A ULP 32 kHz crystal oscillator provides high accuracy timing for low report rate synchronous protocols and a 16 MHz RC oscillator provides fast start-up times from idle. The 32 kHz oscillator can provide timing accurate enough for higher report rate protocols without requiring an external crystal. A security co-processor enables AES encrypted wireless communication. The nRF24LE1 provides a range of nanoamp and microamp idle modes specifically designed for ULP RF protocol stacks. Further benefits include higher precision protocol timing, lower power consumption and improved co-existence performance.

For the application layer the nRF24LE1 offers a rich set of interfaces and peripherals including an SPI, 2-wire, UART, 12-bit ADC, PWM and an analog comparator. As such, the nRF24LE1 is the ideal single chip solution for applications including mice, keyboards, remote controls, game controllers, sports/healthcare sensors, toys and active RFID tags.


For further information: nRF24LE1