Continental SVISMKFNA04 User Manual

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Document :

Function Description / User Manual for Smart Key System

Project :

Project Code :

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Version: 0.2

Date: Sep. 18 '06

Engineering change order-No.:

Smart Key ECU & Smart Key Fob

Design Freeze No.:

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Number of pages:

Filename: User Manual for SMK ECU & Fob

SV SASCO

Identification No. :

Page 2

Operation Guide

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.

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Caution !

Any changes or modifications to the equipment not expressly approved by the party responsibl e for compliance could void user’s authority to operate the equipment.

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Editor : KK Ko Document name Project code

ECO / DF No.

Version: 0.5 Aug. 10. 2006

File: User Manual for SMK ECU & Fob

Identification No. : Document No.

Page 2 / 14

Page 3

Contents list Page

System configulation 4

1.1 scope of SMART KEY SYSTEM 4

1.2 short description of the SYSTEM 4

1.2.1 General De finition of SMART KEY 4

1.2.2 Wireless Communication 4

1.2.3 concept Des cription 4

1.2.4 System Architecture 5

1.2.5 Main Functions 6

1.3 System Overview / Block Diagram 7 2 SMK ECU Configuration 9

2.1 Block Diagram 9

2.2 Pin Description 10

2.3 SMART Key Ecu (SMK ECU) 11 3 SMK Fob Configuration (Transmitter) 13

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3.1 Block Diagram 13

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3.2 Technical Data of SMK Fob 13 4 SMK ECU Test Board for homologation 13

4.1 Shape of tool box 13

4.2 Switch 14

4.3 Method to use Test board 14 5 SMK Fob for homologation 14

5.1 Button operation for homologation 14

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Page 4

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/locking of the two front doors via a toggle push button in the door

handles

• passive access trunk/tailgate via the trunk lid switch at the trunk

• max. 2 SMART KEY FOBs can be handled by the system

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• immobilizer backup antenna driver integrated into MSL

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• communication to the engine management system via a single line interface

• communication to the MSL via a single line interface

• block of the steering column by the MSL device

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). The SMART KEY system is triggered by

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pressing a push button in the door handle.

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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.

In a similar manner the vehicle’s Mechatronic Steering Lock (MSL) is released. Again, a communication between the vehicle and the SMART KEY FOB is needed before any actions will be performed.

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.

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Version: 0.5 Aug. 10. 2006

File: User Manual for SMK ECU & Fob

Identification No. : Document No.

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Page 5

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.

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),

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• less sensitive for detuning compared to higher frequency.

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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.

1.2.4 System Architecture

The system is designed as an optional system, making it possible to equip vehicles of the same car-Line with different levels of access control systems.

The system is suitable to be integrated into an existing architecture that provides central locking functions with standard remote control. This proposal assumes that the following functions / devices are already present in the vehicle’s architecture.

• Central locking system (latch / motor – drivers etc.)

• Standard body control functions

• Warning buzzer

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File: User Manual for SMK ECU & Fob

Identification No. : Document No.

Page 5 / 14

Page 6

1.2.5 Main Functions

• The system allows the user to access and exit (unlock and lock) the vehicle without

performing any actions with the SMART KEY FOB.

• The system allows the user to release the MSL and to switch the power modes (Off,

Accessory, Ignition), as well as to start and stop the vehicle’s engine without performing any actions with the SMART KEY FOB.

• Additionally, the system offers a so called “limp home mode”, wherein the user can

operate all vehicle functions by inserting the key into the MSL or by inserting the mechanical key blade into the door lock.

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Figure 1: Offered System Components

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Page 7

1.3 System Overview / Block Diagram

SMART KEY FOB

Challenge (LF-Up-link)

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Response (RF-Down-link)

Passive Access Detection Range

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Figure 2: Principle of Communication

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Page 7 / 14

Page 8

System Architecture for SmartKey

MSL

Immobilizer

Single line

BCM,

Body CAN/

LIN

serial communication

9.6 kBd

DDM,

...

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Transponder

communication

LF antenna

(SMK)

LF communication

(SMK)

3.9 kBd ASK 125 KHz

Fob

SMK

SmartKey

ECU

Single line

serial communication

10.4 kBd / KWP2000

Single line

serial communication

4.8 kBd

SMK

LF driver

Single line

serial communication

9.6 kBd

SRx

RF communication

(RKE and Pase)

1kBd FSK

315/433/447 MHz

Diag-Tool

EMS

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Figure 3: System Block Diagram

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Page 9

2 SMK ECU Configuration

2.1 Block Diagram

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Page 10

2.2 Pin Description

Function I/O Pin Description Load Configuration

OFF configuration ON Configuration

Analog

Input

A1 VBAT Switch Open A8 A_ALT_L Switch Open

A9 L_ACC Switch Open A14 L_IGN1 Switch Open A19 L_PUSH_KNOB Switch Open

A6 L_FL_DR_LOCK/ UNLOCK Switch Open

Logic Input

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A20 L_FR _DR_LOCK/ UNLOCK Switch Open

A5 L_TRUNK_LID/L_TAIL_GATE Switch Open A15 L_P_POSITION/ L_CLUTCH Switch Open A23 L_KEY_IN1(LOW SIDE SW) Switch Open A24 L_KEY_IN2 (HIGH SIDE SW) Switch Open

A18

O_ESCL_ENABLE

(O_SPARE2)

Output Off

A17 O_KEYOUT_IND Output Off

Output

A7 O_EXT_BUZZER Output Off

A2 O_IMMO_IND Output Off

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Antenna

B8 O_FL_DR_ANTENNA1

Output Off

B16 O_FL_DR_ANTENNA2

Connect to main Battery via Switch Connect to main Battery via Switch Connect to main Battery via Switch Connect to main Battery via Switch Connect to main Ground via Switch Connect to main Ground via Switch Connect to main Ground via Switch Connect to main Ground via Switch Connect to main Ground via Switch Connect to main Ground via Switch Connect to main Battery via Switch Connect to main Ground via 1KOhm resistor and Output ON Connect to main Battery via resistor 1KOhm and Output ON Connect to main Ground via 1KOhm resistor and Output ON Connect to main Battery via resistor 1KOhm and Output ON

Connect to main Ground via 200uH Antenna and Output ON

B7 O_FR_DR_ANTENNA1 B15 O_FR_DR_ANTENNA2

B6 B14

B13

O_BUMPER /

O_TAIL_GATE_ANTENNA1

O_BUMPER /

O_TAIL_GATE_ANTENNA2

O_TRUNK_ANTENNA1 /

O_INTERIOR3_ANTENNA1

O_TRUNK_ANTENNA2 /

O_INTERIOR3_ANTENNA2

B10 O_INTERIOR1_ANTENNA1

B2 O_INTERIOR1_ANTENNA2

B9 O_INTERIOR2_ANTENNA1

Output Off

Output Off Connect to main Ground via

Connect to main Ground via 200uH Antenna and Output ON

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Page 11

B1 O_INTERIOR2_ANTENNA2 B12 O_INTERIOR4_ANTENNA1

Output Off

B4 O_INTERIOR4_ANTENNA2

200uH Antenna and Output ON

Connect to main Ground via 200uH Antenna and Output ON

B11 O_RESERVE_ANTENNA1

B3 O_RESERVE_ANTENNA2

A21

Diagnostic A22 DIAG_K Open

EMS Com. A25 EMS_COM Open Comunication with LTT

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CAN

Lin A26 LIN(L_SPARE2) Open RF

interface

MSL / ESL

Com.

Ground

A10 CAN_H(L_SPARE3) A11 CAN_L(L_SPARE4)

A13 RF_COM Open Comunication with LTT A12 MSCL_COM/ ESCL_COM Open Comunication with LTT

A3 GROUND1 Main ground Main ground A16 GROUND2 Main ground Main ground

O_SPARE1

(O_VS_CTRL)

L_SPARE1

(F_VS_SIGNAL)

Output Off

Output Off Reserve ( Relay ) Input Open Reserve ( Generate 200Hz)

Open

Connect to main Ground via 200uH Antenna and Output ON

Gernernal communication with LTT

Comunication with LTT in case of CAN option

Communication with LTT in case of LIN option

2.3 SMART Key Ecu (SMK ECU)

The SMK ECU manages all functions related to “Passive Access”, “Passive Unlocking” and “Passive Authorization for Operation”.

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It reads the inputs (Push button, MSL Knob Push Switch, PARK position Switch), controls the outputs (e.g. exterior and interior antennas), and communicates via the CAN/LIN (depends on the vehicle) as well as a single line interface to further devices of the car. For communication with the SMART KEY FOB, the SMK ECU generates a request (challenge) as an encoded and modulated 125 kHz signal at the inductive antenna outputs and receives the SMART KEY FOB’s response via the external RF receiver.

The main functional blocks of the SMK ECU are:

• Power supply

• Microcontroller with FLASH Memory

• Single Line Interface to MSL

• Single Line Interface to SRX

• Single Line Interface to EMS

• Input stage

• LF antenna amplifier/driver

• LIN communication with BCM/ETACS (except EN, VQ ; CAN communication)

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File: User Manual for SMK ECU & Fob

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Page 11 / 14

Page 12

The LF antenna amplifier/driver generates a 125 kHz sinusoidal carrier signal which is distributed to the different antennas.

The signal is 100%-ASK modulated by switching on and off the carrier (the data is Manchester encoded). The power of the carrier is adjustable by software, which means, it is possible to set the power level of the antenna driver for every LF-telegram (e.g. power level stored in the EEPROM).

The LF antenna driver consists of a number of outputs with different switching features.

1. switch on/off driver door handle antenna

2. switch on/off passenger door handle antenna

3. switch on/off bumper antenna for access to the trunk

4. switch on/off interior antennae

5. switch on/off trunk antenna (except SUV)

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The SMK ECU comprises:

• the electronics described above

• a plastic housing

Emitting LF Antennas:

Inductive antennas in and at the vehicle are used to transform the current, driven by the SMK ECU antenna driver, into a 125 kHz magnetic field, which is the carrier for the SMART KEY challenge. Three antennas cover the vehicle’s exterior: two antennas in the Door Handles (DS and PS) cover the area around the doors; one antenna in the rear bumper covers the area around the trunk/tailgate. Up to three antennas cover the vehicle’s interior and the trunk interior: two in the passenger compartment and one in the trunk. (In case of SUV, Three antennas cover the vehicle’s interior and no trunk antenna) Those antennas are based on either Vitrovac™ or ferrite core and have twisted pair terminals on standard pin header.

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Page 13

3 SMK Fob Configuration (Transmitter)

3.1 Block Diagram

Batterie

RF (FSK)

RF Antenna

CLOCK

LF (125kHz, ASK)

Inductive

Receiver

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coils

X,Y,Z axis

125 KHz

Transponder

Mircrocontroller

Processor

Unit

Buttons

ENABLE

DATA

XCLOCK

PLL

Transmitter

Configuration

registers

Crystal

LED

3.2 Technical Data of SMK Fob

Carrier Frequency NA/China : 315MHz

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Field Strength NA/China : < 75.6uV/m at 3m Deviation NA/China : 65~80kHz

Carrier Frequency EU : 433.92MHz Field Strength EU : < 90uV/m at 3m Deviation NA/China : 65~80kHz

Carrier Frequency Korea : 447.725MHz Output power Korea : < 10mW Deviation Korea : < 5kHz

Modulation : FSK Baud rate of RF : 1kBd Supply voltage : 3V Battery Type : Lithium, CR2032

4 SMK ECU Test Board for homologation

4.1 Shape of tool box

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4.2 Switch

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4.3 Method to use Test board

- Prepare VB, GND, K_LINE, GND wire to connect Tool Box.

- Connect Power(VB, GND) to Tool Box.

- Connect communication line(K-LINE, GND) to Tool Box.

- Connect Harness connector to SMK ECU Unit.

- After selecting swich No. , give VB power to test board.(Do not give overvoltage)

5 SMK Fob for homologation

5.1 Button operation for homologation

time button pressing : Low side Frequency (Carrier wave continueous mode)

time button pressing : High side Frequency (Carrier wave continueous mode)

time button pressing : FSK Modulation (Modulated wave continueous mode)

time button pressing : Stop operation.

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Version: 0.5 Aug. 10. 2006

File: User Manual for SMK ECU & Fob

Identification No. : Document No.

Page 14 / 14

Continental SVISMKFNA04 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual