Continental Automotive Technologies MARSKEYLESS Electronic Control Unit User Manual Projekt
Continental Automotive GmbH Electronic Control Unit Projekt
Contents
- 1. Users Manual
- 2. Users Manual revised 1107
Users Manual
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
Sebastian Henke
E-B-D2-HW
Doc. name:
Process
Hardware Description
DAI_MARS_EIS_Homologation.docx
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Hella 8303EN_GE (2004-09)
Table of Content
1 General Information ............................................................................................ 2
2 LF- Performance in Typical Application ............................................................ 3
2.1 LF Antenna Positions in Vehicle ............................................................................. 4
2.2 Authentication Ranges Inside and Outside the Vehicle ........................................... 5
3 HW-Description ................................................................................................... 6
3.1 DAIMLER MARS ECU ............................................................................................ 6
3.2 ECU Layout ............................................................................................................ 6
3.3 ECU Schematic ...................................................................................................... 8
3.4 BOM (Populated Parts) of Hella Part ...................................................................... 9
3.5 Block Diagram of Related Functional Modules ...................................................... 11
4 LF-Driver Hardware Module with 5291 ............................................................ 12
4.1 Functional Description .......................................................................................... 13
4.1.1 General Function ....................................................................................................... 13
4.1.2 PEPS Tx Mode .......................................................................................................... 13
4.1.3 Immo TxRx Mode....................................................................................................... 14
5 LF-Antennas ...................................................................................................... 15
5.1 Documentation C2-Sample ................................................................................... 16
5.1.1 Connection Schematic 207.308-00, A167 905 47 00 ................................................ 16
5.1.2 Picture of the C2-Sample Antenna ............................................................................ 17
5.1.3 Mechanical Parameter ............................................................................................... 18
6 Software for LF Transmitter Mode (Data and CW) for Homologation ........... 19
6.1 LF Data Scan ........................................................................................................ 20
6.1.1 Single Transmission LF Scan .................................................................................... 20
6.1.2 Single Transmission – f = 125kHz Oscillating Signal ............................................... 20
6.1.3 Repetition of Transmissions ...................................................................................... 21
6.2 IMMO Transponder Start ...................................................................................... 22
6.2.1 Single Transponder Start and Repetition of Transmissions ...................................... 22
6.2.2 Data Transmission ..................................................................................................... 23
7 Test Set Up for Homologation .......................................................................... 24
7.1 Setup in Block Diagram View ................................................................................ 24
7.2 ECU and Connector Pinning for Hella design part ................................................ 25
7.3 Components on Setup .......................................................................................... 26
7.4 Schematic ............................................................................................................. 27
8 Housing views including Label ........................................................................ 28
9 PHOTOS ............................................................................................................. 29
10 Warning statement and Label information ..................................................................................31
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
Sebastian Henke
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004-09)
1 General Information
In this document the Keyless GO and Start System is introduced.
Keyless Entry Systems are the consequent development of well-known Remote Keyless Entry Systems
(RKE), the usage of the key fob with button pressing is still possible, but not necessary anymore to
enter the vehicle or to start it.
With the Hella Components UID, LF antennas and Keyless Start ECU it’s possible to equip a vehicle
with only a few components and realize this very convenient and luxury feature.
The ECU is built together with Continental Corporation Germany.
Hella is the Engineering Distributer AND Designer for the part that is to be approved.
The Model Name of the described ECU is:
MARS Keyless
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
2 LF- Performance in Typical Application
In the MARS EIS ECU the Hella LF Driver Part is connected with Hella LF Antennas.
A UID – also manufactured from Hella – is to be found inside or outside the vehicle, whether a special
occasion happens.
Here are some examples:
- Passive Entry / Exit
A Person with the UID nears to the locked vehicle.
If he grabs the door handle capacitive unlock sensor is activated and the complete Keyless Entry
Protocol is started. The side LF antenna is transmitting LF data and a carrier signal, which can be
recognized and judged by quantity (RSSI-measurement) by the UID.
The measured field strength is sent to the ECU and is judged.
If the magnetic field strength is high enough (a certain border is reached). The doors will unlock.
The additional LF communication guaranties the functionality, that only the valid key OUTSIDE the
vehicle authenticates the system to unlock the car passively.
If the magnetic field strength is not high enough (e.g. the UID is too far away from the vehicle, the
border is not reached), the UID shuts down again and waits for the next LF Data. The vehicle is still
locked.
A Person with the UID is leaving the vehicle. If he touches the capacitive lock sensor at the door
handle, the complete Keyless Exit Protocol is started:
The side LF antenna is transmitting LF data and a carrier signal, which can be recognized and judged
by quantity (RSSI-measurement) by the UID.
The measured field strength is sent to the ECU and is judged.
If the magnetic field strength is high enough (a certain border is reached). The doors will lock.
The additional LF communication guaranties the functionality, that only the valid key OUTSIDE the
vehicle authenticates the system lock the car passively. If the UID is left inside the car, the car won’t
lock.
If the magnetic field strength is not high enough (e.g. the UID is too far away from the vehicle, the
border is not reached), the UID shuts down again and waits for the next LF Data. The vehicle is still
open.
- Passive Start
A Person with the UID inside of the vehicle is pressing the Start-Stop-Switch. The Start-Stop-Switch
activates the complete Keyless Start protocol:
The interior antenna is transmitting the LF Data and a carrier signal, which can be recognized and
judged by quantity (RSSI-measurement) by the UID.
The other two interior antennas IN1 and IN2 transmit two additional carrier signals sequential.
If the magnetic field strength of one of these transmits is high enough (a certain border is reached) then
the UID authenticates the system to start the vehicle.
If the magnetic field strength of all antenna transmits are too low (the field strength border is not
reached, maybe the UID is laying outside or is held 10cm outside the vehicle) the car won’t start.
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
Sebastian Henke
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004-09)
2.1 LF Antenna Positions in Vehicle
Fig. 1 Antenna Positions at a Keyless Entry / Keyless Start Vehicle
side LF antenna driver (left)
side LF antenna passenger (right)
IN1
IN2
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
Sebastian Henke
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004-09)
2.2 Authentication Ranges Inside and Outside the Vehicle
Fig. 2 Principle of Magnetic Field Detection Areas
outside detection
outside detection
inside detection
outside rear
detection
approx. 180cm
approx. 180cm
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
Sebastian Henke
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004-09)
3 HW-Description
3.1 DAIMLER MARS ECU
The main tasks of the MARS EIS ECU are: Entry/Exit functionality with unlock and lock sensor signal
analysis, Keyless Go / Keyless Start functionality, LF-Message transmission, Immobilizing functionality
communication with other ECU’s on CAN by building a gateway (not in focus, it’s Continental part).
3.2 ECU Layout
Fig. 3 Layer 1 Fig. 4 Layer 2
Fig. 5 Layer 3 Fig. 6 Layer 4
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
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E-B-D2-HW
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Process
Hardware Description
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Hella 8303EN_GE (2004-09)
Fig. 7 Layer 5 Fig. 8 Layer 6
Fig. 9 Layout LF- Driver Part in Detail, marked orange area is to generate f=125kHz-signal
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
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Hella 8303EN_GE (2004-09)
3.3 ECU Schematic
Fig. 10 Schematic of LF Driver Part of MARS EIS ECU
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
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E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004-09)
3.4 BOM (Populated Parts) of Hella Part
C600
100p
D670
BAT54
R664
1k
C601
100p
D685
SBAS40LT1G
R665
33.2k
C602
10n
D700
SS2H10HE3
R666
10k
C603
390p
D701
SS2H10HE3
R667
100k
C604
1n
IC002
ATA5291
R670
49.9k
C605
1n
IC685
HEF40106BT
R671
100k
C606
220n
L700
47u
R672
100k
C607
220n
L701
47u
R673
165
C608
1n
R600
10k
R674
499
C609
1n
R601
49.9k
R675
100k
C610
10n
R602
22k
R676
22k
C611
10n
R603
10k
R677
10k
C612
100n
R604
10k
R678
100k
C613
560p
R605
100k
R679
1k
C614
47u
R606
22k
R680
33.2k
C615
100n
R607
49.9k
R681
10k
C616
15n
R608
100k
R682
100k
C617
470n
R609
499
R683
100k
C655
100p
R610
115
R685
100k
C656
220n
R611
10k
R686
49.9k
C657
1n
R612
1,24
R687
115
C658
10n
R613
49.9k
R688
22k
C659
15n
R614
100k
R689
10k
C670
100p
R615
499
R690
3.3k
C671
220n
R616
100k
R701
1
C672
10n
R617
1k
R702
100k
C673
15n
R618
33.2k
R703
442
C674
1n
R619
100k
R704
47k
C685
100n
R620
165
R705
50m
C686
560p
R621
100k
R706
47k
C687
390p
R622
100k
R707
50m
C688
100n
R623
22k
R708
1
C700
100n
R624
49.9k
R709
50m
C701
4.7n
R625
100k
R710
2.2k
C702
10n
R626
100k
R711
50m
C703
4.7u
R627
5.62k
R712
44.2k
C704
4.7u
R628
100k
R713
442
C705
4.7n
R629
22k
R714
4,7
C706
10u
R630
10k
RN700
10k
C707
4.7n
R631
165
RN701
2.2k
C708
100n
R632
100k
RN702
100k
C709
4.7n
R633
1k
T600
SMUN5313DW1
C710
4.7n
R634
33.2k
T601
SMUN5313DW1
C712
4.7n
R635
10k
T602
SMMUN2213LT3
C714
4.7n
R636
100k
T603
BC817C
C715
4.7n
R637
10k
T604
SMMUN2213LT3
C716
4.7n
R638
100k
T605
BC817C
C717
3.3u
R639
10k
T606
SMMUN2213LT3
C718
4.7n
R640
4.99k
T607
BC817C
C719
220u
R641
49.9k
T608
SMUN5313DW1
C720
100n
R642
165
T609
BC807C
C721
220n
R643
165
T610
BC807C
C722
220n
R644
165
T611
NVTFS5124PL
C723
220n
R645
165
T612
SQ3427EV
C724
10n
R647
100k
T613
SMUN5313DW1
C725
1n
R648
1k
T614
SMUN5313DW1
C726
330u
R655
49.9k
T615
SMUN5313DW1
D600
SBAS40LT1G
R656
100k
T616
SMUN5313DW1
D601
BAT54
R657
100k
T617
SQ3427EV
D602
BAT54
R658
165
T618
SMMUN2213LT3
D603
BAS21
R659
499
T619
SQ3427EV
D604
SS2H10HE3
R660
100k
T620
BC807C
D605
BAV70
R661
22k
T621
BC807C
D655
BAT54
R662
10k
T622
BC807C
D656
BAV70
R663
100k
T623
BC817C
This list is NOT to be shown to third
parties!!!
Parts used in Hella schematic part that is to be approved.
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
Sebastian Henke
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004-09)
T624
BC817C
T655
BC817C
T656
SMUN5313DW1
T657
SQ3427EV
T658
SMUN5313DW1
T659
BC807C
T660
BC807C
T670
BC817C
T671
SMUN5313DW1
T672
SQ3427EV
T673
SMUN5313DW1
T674
BC807C
T675
BC807C
T685
BC817C
T686
SMMUN2213LT3
T687
BC817C
T700
BSP318S
T701
BSP318S
Table 1 BOM of populated parts
This list is NOT to be shown to third
parties!!!
Parts used in Hella schematic part that is to be approved.
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
Dept.:
Sebastian Henke
E-B-D2-HW
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Hella 8303EN_GE (2004-09)
3.5 Block Diagram of Related Functional Modules
Fig. 11 Block diagram of modules in the ECU, LF driver in orange marked area
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
4 LF-Driver Hardware Module with 5291
Fig. 12 Block diagram, architecture of Hella part
Fig. 13 Block diagram, LF driver module
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Author:
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
4.1 Functional Description
4.1.1 General Function
The ATA5291 is the main part of generating a f=125kHz signal and drive it through four series resonant
circuits, called LF antennas.
It is an ASIC with a sine-wave-generation circuitry to avoid noise in the AM-Band.
4.1.2 PEPS Tx Mode
Fig. 14 Extract from Datasheet
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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Hella 8303EN_GE (2004-09)
4.1.3 Immo TxRx Mode
Fig. 15 Extract from Datasheet
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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Hella 8303EN_GE (2004-09)
5 LF-Antennas
The LF antennas generate the magnetic field that is needed for wireless communication between car
electronic components and the UID that is carried with by the end-user.
Each LF antenna that is plugged to the ECU is a LCR resonant circuitry:
Fig. 16 LF Antenna, RLC resonant circuit
Fig. 17 LF-Antenna, Impedance Z
The LF antennas transmit the LF challenge signals (data) and the LF carrier wave signals. They are
activated by the MAR EIS ECU using a controlled current.
ALL LF Antennas have the same efficiency.
The efficiency of all antennas is Hmax(@l=1m, @IANT=500mA) =77,5 dBµA/m.
The general measurement of the efficiency of the antennas is shown is this picture:
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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Hella 8303EN_GE (2004-09)
Fig. 18 LF-Antenna Efficiency Test Setup
The used LF antenna for homologation setup (the same as inside the car) has the following typical
electrical parameters and is equal to ALL possible antennas in the system:
fres = 125kHz
L = 326µH
R = 8Ohm
Z@125kHz = 12…18 Ohm
5.1 Documentation C2-Sample
5.1.1 Connection Schematic 207.308-00, A167 905 47 00
Fig. 19 Antenna Schematic
1
2
3
LF Mid_Immo
LF1 IMMO
LF2 IMMO
C
R
L
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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Hella 8303EN_GE (2004-09)
5.1.2 Picture of the C2-Sample Antenna
Fig. 20 Antenna housing and pinning
2.1Ohm 326µH
4.7nF 8Ohm
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Hella 8303EN_GE (2004-09)
5.1.3 Mechanical Parameter
Fig. 21 Extract of the antenna part description
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Hella 8303EN_GE (2004-09)
6 Software for LF Transmitter Mode (Data and CW) for
Homologation
The LF Transmission for Homologation Purpose is an original LF Scan for a Passive Entry / Passive
Exit action.
The LF driver IC is especially made for driving an electric current at f=125kHz with a certain modulation
and bit structure. Only short burst shall be sent out at different antennas channels in a certain timing.
It is NOT possible to drive the antennas with a continuous carrier signal. The maximum of
carrier (unmodulated) signal length that can be driven – and is driven for magnetic field strength
measurement in the UID – is tcarrier=5,2ms.
The SW of the ECU has two small changes in comparison to the mass production software:
First:
As the setup is connected to the power supply (V = 12V / I = 5A) and the lever is set to “Open – LF
Mode”, an LF data scan is automatically generated on all four antennas with a time gap of 23ms
between each antenna and a pause of 273ms after the last antenna.
So, a continuous repetitive scanning is created, that is similar to the system reaction, as if a person is
grabbing the door handle to enter the locked vehicle every 370ms with not having the UID in detection
range.
Second:
As the setup is connected to the power supply (V = 12V / I = 5A) and the lever is set to “GND – IMMO
Mode”, an Immo transponder start is automatically generated on the IMMO-antenna every 3,25s.
After a successful keyfob answer the LED is powered for 100ms.
IMPORTANT NOTE: This Second functionality is only allowed to be used 1 Minute and then a power
down of 2 Minutes is needed. Otherwise the protocol won’t finish completely and the LED won’t light up
due to warmup of the ECU. In mass production / series such a stress never would occur!
To switch between those two functions simply turn the lever in the designated position and
perform a power-on reset.
There are no other SW changes to the mass production software.
The scope-diagrams in the following are taken by a simple AIR-COIL (15 windings, 4cm diameter),
which is positioned near to the test setup. This coil is connected to a 150MHz Scope Probe (x10).
With this SW FOUR ANTENNAS are mentioned to the system.
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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Hella 8303EN_GE (2004-09)
6.1 LF Data Scan
6.1.1 Single Transmission LF Scan
Fig. 22 Scope Shot from complete single LF scan
6.1.2 Single Transmission – f = 125kHz Oscillating Signal
The ECU drives a sinusoidal output signal. The frequency is f=125kHz. The magnetic field as the result
is oscillating the same:
Fig. 23 Oscillating signal at f=125kHz
8µs
5,2ms
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Hella 8303EN_GE (2004-09)
6.1.3 Repetition of Transmissions
All four LF-antennas are powered and the LF scan is repeated frequently due to homologation purpose:
Fig. 24 LF-Signal repetition
273 ms
23 ms
370 ms
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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Dept.:
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Hella 8303EN_GE (2004-09)
6.2 IMMO Transponder Start
6.2.1 Single Transponder Start and Repetition of Transmissions
Fig. 25 Scope Shot of Transponder Transmission
3,25 s
1,25 s
860 ms
2 s
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
6.2.2 Data Transmission
Fig. 26 Scope Shot of Data Transmission in in the Transponder Protocol
28 ms
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
7 Test Set Up for Homologation
7.1 Setup in Block Diagram View
Fig. 27 Block diagram of the Test Setup
12V (red)
GND (blue)
LF Antenna IN IMMO
MARS EIS ECU
LF Antenna IN Back
LF Antenna Right
LF Antenna Left
Function
Control Box
Keyfob
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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Hella 8303EN_GE (2004-09)
7.2 ECU and Connector Pinning for Hella design part
Connector Name
PIN
(inside)
PIN
(outside)
Connector name
LIN-HFA
21
1
EDS_HF
DATA TAG FT
22
2
23
3
DATA TAG BFT
24
4
GND TAG BFT
25
5
DATA TAG HL
26
6
GND TAG HL
27
7
DATA TAG HR
28
8
GND TAG HR
29
9
KL30_TAG NFC FT
30
10
GND TAG FT
31
11
32
12
33
13
LF Mid_IMMO
34
14
LF2 IMMO
35
15
LF1 IMMO
LF2 hinten
36
16
LF1 hinten
LF2 rechts
37
17
LF1 rechts
LF2 links
38
18
LF1 links
free (reserved for LF2)
39
19
free (reserved for LF1)
40
20
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
7.3 Components on Setup
Fig. 28 Components on setup
Ant 1 IN IMMO
MARS EIS ECU
Power Supply
Ant 2 IN Back
Ant 3 Left
Ant 4 Right
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
7.4 Schematic
38
16
EIS / Gateway Part
21
22
2
3
23
24
4
5
25
26
6
7
27
28
8
9
31
11
32
12
34
14
35
15
12V
GND
FLEXRAY_BP_1
FLEXRAY_BM_1
FLEXRAY_BP_2
FLEXRAY_BM_2
FLEXRAY_BP_3
FLEXRAY_BM_3
FLEXRAY_BP_4
FLEXRAY_BM_4
FLEXRAY_BP_5
FLEXRAY_BM_5
FLEXRAY_BP_6
FLEXRAY_BM_6
FLEXRAY_BP_7
FLEXRAY_BM_7
FLEXRAY_BP_8
FLEXRAY_BM_8
CAN_HMI_HIGH
CAN_HMI_LOW
CAN_PERI_HIGH
CAN_PERI_LOW
CAN_DIAG_HIGH
CAN_DIAG_LOW
CAN_BODY_HIGH
CAN_BODY_LOW
Continental
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Hella 8303EN_GE (2004-09)
8 Housing views including Label
Fig. 29 Housing Top view (1) with details (2D)
Mode Switch(EDS_HF)
Keyless Start Part
39
19
38
18
37
17
36
16
35
34
15
1
Ant 1 (links)
1
2
Ant 2 (rechts)
1
2
Ant 3 (hinten)
1
2
Ant 4 (IMMO)
1
2
3
Reserved LF
Reserved LF
Hella
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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E-B-D2-HW
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Hella 8303EN_GE (2004-09)
Fig. 30 Label (2D)
9 PHOTOS
Fig. 31 MARS EIS ECU PCBA Top View
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Hella 8303EN_GE (2004-09)
Fig. 32 MARS EIS ECU PCBA Top View with important module marked
Fig. 33 MARS EIS ECU PCBA Bottom View
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Hella 8303EN_GE (2004-09)
Fig. 34 MARS EIS ECU PCBA Bottom View with important module marked
10 Warning statement and Label information
According to 47 CFR 15.19 (labeling requirements) the car manufacturer will print the
following text in the
appropriate User's Manual of the car:
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.
Usually this is followed by the following FCC caution:
Any changes or modification not expressly approved by the party responsible for compliance
could void the user's authority to operate this equipment.