Continental Automotive Systems HMFNA04 Smart Key Fob User Manual SVI 2NDFNA04 Manual

Continental Automotive Systems Corporation Smart Key Fob SVI 2NDFNA04 Manual

User manual

SIEMENS Automotive systems Corp. SASCO Page 1 of 5 Functional Description / User Manual SIEMENS Automotive Systems Corp. Smart Key Fob SVI-HMFNA04
SIEMENS Automotive systems Corp. SASCO Page 2 of 5 FCC Compliance Statement. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions : (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Do Not. Any changes or modifications to the equipment not expressly approved by the party responsible for compliance could void user’s authority to operate the equipment.
.Proprietary data, company confidential. All rights reserved.Confié à titre de secret d'entreprise. Tous droits réservés.Comunicado como segredo empresarial. Reservados todos os direitos.Confidado como secreto industrial. Nos reservamos todos los derechos. .Weitergabe sowie Vervielfältigung dieser Unterlage, Ver-wertung und Mitteilung ihres Inhalts nicht gestattet, soweitnicht ausdrücklich zugestanden. Zuwiderhandlungen ver-pflichten zu Schadenersatz. Alle Rechte vorbehalten, insbe-sondere für den Fall der Patenterteilung oder GM-Eintragung 1. System configulation 1.1 Scope of SMART KEY SYSTEM The System offers the following features: • passive access for two doors, driver side and passenger side as well as trunk/tailgate • passive start after interior detection of the SMART KEY FOB (without interior trunk and hat shelf detection) • LF-RF communication (based on Siemens’ SMART KEY system) • passive access trunk/tailgate via the trunk lid switch at the trunk • max. 2 SMART KEY FOBs can be handled by the system • communication to the engine management system via a single line interface • communication to the ESCL via a single line interface 1.2 Short description of the SYSTEM 1.2.1 General Definition of SMART KEY The SMART KEY system is a system that allows the user to access and operate a vehicle in a very convenient way. To access the vehicle no traditional key or remote control unit is needed. The user carries a SMART KEY FOB which itself does not require any conscious actions by the user (e.g. operate a button). After being triggered the vehicle sends out a request in a limited range. If the SMART KEY FOB receives this request, it automatically sends a response to the vehicle. Then the system decides whether to perform a particular action (unlocking, locking…) or remain inactive. 1.2.2 Wireless Communication Electromagnetic waves are used to exchange information between the vehicle and the SMART KEY FOB. Both, vehicle and SMART KEY FOB are equipped with a transmitter, a receiver and several antennas. 1.2.3 Concept Description With this concept it is possible to have a set of interior antennas that covers the vehicle’s interior and a set of exterior antennas that covers the vehicle’s exterior. For an unambiguous separation between the vehicle’s interior and exterior it is sufficient that at least one area is covered exactly by the corresponding operating ranges of the antennas. The functions of the SMART KEY system have to be provided in a clearly defined and limited range. For the up-link from the vehicle to the SMART KEY FOB, a magnetic field with a frequency of 125 kHz and ASK modulation is used. Inductive antennas in and at the vehicle radiate the electromagnetic energy.
.Proprietary data, company confidential. All rights reserved.Confié à titre de secret d'entreprise. Tous droits réservés.Comunicado como segredo empresarial. Reservados todos os direitos.Confidado como secreto industrial. Nos reservamos todos los derechos. .Weitergabe sowie Vervielfältigung dieser Unterlage, Ver-wertung und Mitteilung ihres Inhalts nicht gestattet, soweitnicht ausdrücklich zugestanden. Zuwiderhandlungen ver-pflichten zu Schadenersatz. Alle Rechte vorbehalten, insbe-sondere für den Fall der Patenterteilung oder GM-Eintragung Technical aspects of 125 kHz – magnetic field: • virtually no reflections, • cubical decrease of field strength → allows good range control, • released frequency band (ISM), • high penetration, • low quiescent current demand due to 125 kHz input stage (SMART KEY FOB), • less sensitive for detuning compared to higher frequency. For the down-link from the SMART KEY FOB to the vehicle, the standard radio frequency (RF) is used (similar to the classic remote control functions) with FSK modulation. 1.3 System Overview / Block Diagram Figure 1: Principle of Communication ECU sends LF challenge via exterior antenna ID tag sends identification code to RF receiverDoors are unlocked automatically User pulls open the door LF
.Proprietary data, company confidential. All rights reserved.Confié à titre de secret d'entreprise. Tous droits réservés.Comunicado como segredo empresarial. Reservados todos os direitos.Confidado como secreto industrial. Nos reservamos todos los derechos. .Weitergabe sowie Vervielfältigung dieser Unterlage, Ver-wertung und Mitteilung ihres Inhalts nicht gestattet, soweitnicht ausdrücklich zugestanden. Zuwiderhandlungen ver-pflichten zu Schadenersatz. Alle Rechte vorbehalten, insbe-sondere für den Fall der Patenterteilung oder GM-Eintragung Figure 2: System Block Diagram
.Proprietary data, company confidential. All rights reserved.Confié à titre de secret d'entreprise. Tous droits réservés.Comunicado como segredo empresarial. Reservados todos os direitos.Confidado como secreto industrial. Nos reservamos todos los derechos. .Weitergabe sowie Vervielfältigung dieser Unterlage, Ver-wertung und Mitteilung ihres Inhalts nicht gestattet, soweitnicht ausdrücklich zugestanden. Zuwiderhandlungen ver-pflichten zu Schadenersatz. Alle Rechte vorbehalten, insbe-sondere für den Fall der Patenterteilung oder GM-Eintragung 2 Smart Key Fob for homologation 2.1 Button operation for homologation 1st time button pressing : Low side Frequency (Carrier wave continueous mode) 2nd time button pressing : High side Frequency (Carrier wave continueous mode) 3rd time button pressing : FSK Modulation (Modulated wave continueous mode) 4th time button pressing : Stop operation.

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