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PIC MCU KEELOQ/AES receiver system with acknowledge

Posted: 29 Jul 2010 ?? ?Print Version ?Bookmark and Share

Keywords:receiver system? MCU KEELOQ? access point?

A number of remote access applications rely on the user verifying if the access point (gate, door, vehicle etc.) has been properly closed or opened. This application note describes a system by which the access point (receiver) responds back to the remote transmitter with a status message.

The proposed transmitter/receiver system enables a two-way communication for the Remote Keyless Entry systems. The receiver acknowledges every command by sending back data to the key fob transmitter. The system is very flexible and allows different encryption algorithms to be used within the same receiver. The interface with the radio transceiver is also flexible, allowing easy modifications to suit different devices. The receiver is also controllable via the I2C port, enabling the receiver to be controlled by an external controller.

Also, the firmware is modular, allowing fast new encryption algorithms implementation, adding new features and changing for another radio transceiver.

View the PDF document for more information.

Click here to view related datasheets.

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