Huf Korea 26-013-500 Fob Holder User Manual BH HM Manual KOR

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Document ID	818576
Application ID	hyjE5J14HiPOJXDJ8uetsA==
Document Description	Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	7.64kB (95439 bits)
Date Submitted	2007-07-19 00:00:00
Date Available	2007-07-19 00:00:00
Creation Date	2007-07-03 16:54:09
Producing Software	Acrobat Distiller 7.0.5 (Windows)
Document Lastmod	2007-07-03 16:54:09
Document Title	Microsoft Word - BH_HM_Manual_KOR.doc
Document Creator	PScript5.dll Version 5.2
Document Author:	user1

BH,HM Fob Holder Manual
(HUF-BHKRFH (Project name :BH Fob Holder)
(HUF-HMKRFH (Project name :HM Fob Holder)
Contents list
ABBREVIATIONS AND DEFINITIONS
3.
GENERAL DESCRIPTION
3.
FUNCTIONAL DESCRIPTION
3.1
Fob-Holder operation procedure
3.2
Transponder Authentication
3.3
Block Diagram of Fob Holder
1
ABBREVIATIONS AND DEFINITIONS
Abbreviations
Description
FH
HF
IC
IPM
LF
PCB
PDM
PIC
Fob-Holder
High Frequency
Integrated Circuit
Instrument Panel Module
Low Frequency
Printed Circuit Board
Power Device Module
Personal Identification Card
GENERAL DESCRIPTION
The Fob Holder is a part of the locking system. It is the interface towards the user to start/stop the
vehicle. It consists of the Fob-Holder (FH) incl. the transponder for the Limp Home Mode
communication.
For starting the engine two operation modes are available:
1) PIC-Mode
The Fob Key has not to be inserted into the Fob-Holder, the authentitication is done directly by
request of the IPM to the Fob Key via LF-signal and response of the Fob Key to the IPM via RFcommunication.
2) Limp Home Mode
If the Fob battery is low the car can only be started by identifying the Fob transponder, therefore
the Fob Key has to be inserted into the Fob-Holder.
The Fob Holder has the following basic functions:
Fob-Holder:
- Communication to the Fob Key transponder (only for Limp Home Mode)
- Hold the Fob and keep it in locked position
- Illumination of the Fob-Holder
- Rotational damper for better comfort behaviour when releasing the FOB
Figure 1
Fob-Holder
3
FUNCTIONAL DESCRIPTION
The Fob-Holder is the interface between driver and other body electronic modules.
The Fob-Holder has an integrated coil and the driver to communicate with the transponder by a 125
kHz LF electromagnetic field. The coil is placed in such a manner as to achieve sufficient coupling
with the transponder coil in the Fob Key (coupling factor ≥ 1.0% in locked position).The PDM
authenticates the Fob Key transponder through the Fob-Holder. The communication between FobHolder and PDM is via one wire Interface to the PCF Base station IC.
3.1
FOB-HOLDER OPERATION PROCEDURE
User action
The Fob Key has to be inserted into the
Fob-Holder; it will be kept in position
removable
The Fob Key has to be pushed in (nominal
5mm stroke) against a spring force until
stop and released with a linear spring force
of xx N (tbd.)
The Fob Key has to be pushed again
against a spring force until stop
The Fob Key gets pushed back smoothly by
spring tension together with an additional
rotational damper with a speed of xx
mm/min. (tbd.)
Technical response
No response it this position
Fob Key-In-switch is closed;
Fob is in locked position
Fob Key gets unlocked
When the Fob Key is in locked position the locking mechanism of the Fob Holder must withstand a
force of min. 100 N when the force is applied to the key ring of the Fob Key.
The Fob Key is locked inside the Fob-Holder mechanically, so it can be removed even if the battery power is
low. An extraction of the Fob Key while driving is possible.
3.2
TRANSPONDER AUTHENTICATION
The Fob-Holder has an integrated coil to communicate with the transponder. On the Assy PCB the
Base station IC PCF7991 is placed. This IC demodulates the 125 kHz signal from the transponder.
The µC is located in the IPM and communicates with the Base station via the SPI Interface of the
PCF 7991.
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.

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