Turnkey Reference Design for Remote Keyless Entry System


The SX1230-13RKEA433 reference design kit provides a turnkey platform for highly secure, low-power, multi-band wireless remote keyless entry (RKE) systems. This RKE kit integrates Semtech’s high-performance transmitter, tranceiver and switching regulator ICs with Microchip’s KEELOQ® code-hopping technology running on PIC® microcontrollers (MCUs). The kit helps simplify and accelerate the development of secure, high-performance and cost-effective RKE systems for vehicles, office buildings and homes, and provides a single platform that works across virtually all major frequency regulations.

The RKE reference-design hardware includes transmitter (Tx) and receiver (Rx) boards, multi-band PCB antenna and Microchip MCUs, and runs Microchip’s KEELOQ code-hopping encryption software. Confidential information is stored inside the Flash memory of the PIC microcontroller, while the KEELOQ security algorithm encrypts the information in the RF transmission packets prior to any RF transmission, unlike some existing RKE systems in the market.

The Tx board pairs Semtech’s SX1230 industrial, scientific and medical (ISM) band transmitter with Microchip’s PIC16F631 or PIC16F677 8-bit MCUs. The Rx board employs Semtech’s SX1211 or SX1212 ISM transceivers with Microchip’s PIC16F631 or PIC16F677 MCUs. The RKE reference design also uses Semtech's SC120 switching regulator -- the world's smallest low VIN boost converter in a 1.5x2x0.6mm package.

Remote Keyless Entry Reference Design Features
Turnkey hardware and software RKE reference design, including:
- Hardware: integrated RF ICs, multi-band PCB antenna, MCU
- Software: KEELOQ code-hopping technology software
Highly secure:
- Encrypts all RF packets before sending, no plain text sent over air
- Code-hopping encryption produces unique RF transmission each time.
Saves design cost and time
- Same design supports multi-band (315, 434, 868, 915MHz) and multiple modulation formats (FSK,
OOK, ASK)
No tuning for lower production costs
Long range: programmable POUT up to +17dBm

Download Remote Keyless Entry Demo with Encrypted Rolling Code Application Note

Semtech Products for Remote Keyless Entry