Huf Group
User Manual for Homologation:
FLUSHNFC
H32 Flushnfc Reneval of NFC Sensor
Huf project number.: 8000.499
Huf project name: Volkswagen / MQB A/B SUVe ID C-CUV SUV – 4D / OBW
ODH Electronics – VW316/Reneval of NFC Sensor development with MDK2.x
Brand: Huf
Component: FLUSHNFC
HW-Version: H32
SW-Version: ANFCREADERLIBRARY_VW_380_V18 
Change History
| Index | Changes | Date |
| 000 | Initial version | 22.02.2024 |
List of abbreviations
| AM | Amplitudenmodulation |
| ASK | Amplitude shift keying |
| CW | Continuous wave |
| ECU | Electronic Control Unit |
| eTSG | ellir-Steuer-Gerat |
| ETSI | European Telecommunications Standards Institute |
| Huf | Huf Hiilsbeck & Furst GmbH & Co. KG |
| IEC | International Electro technical Commission |
| ISO | International Organization for Standardization |
| LPCD | Low Power Card Detection |
| MECVD | Multipuls Enhanced Capacitive Voltage Divider |
| NFC | Near Field Communication |
| OEM | Original Equipment Manufacturer |
| OOK | On/ Off Keying |
| PCB | Printed Circuit Board |
| PCBA | Printed Circuit Board Assembly |
| PCD | Proximity coupling device |
| PICC | Proximity integrated circuit card |
| RED | Radio Equipment Directive |
| RF | Radio-Frequency |
Product Overview
1.1 Intendent Use
The intendet use for the end user is to unlock or lock the car by using the capacity sensors (unlock sensor / lock sensor) of the Door Handle or via the NFC Interface in combination with a valid NFC device.
1.2 Product variants
The door handle electronics consists of one PCB with Kessy+NFC function – which can be potted in a left-hand driver and also in a right-hand-driver doorhandle.
➢ Sensor Kessy+ NFC: (6pol.)
o Electronics with two capacitive sensors (Lock/ Unlock), NFC and CAN interface
1.2.1 Function capacative sensors:
There are two different capacitive sensors. The first sensor is used for unlock function and designed as an approach sensor. The second sensor is used for lock function and is designed as a touch sensor.
Keyless access is enabled by activating the sensors on the door handle in combination with the door handle-ECU, whereby the vehicle can be unlocked or locked.
1.2.2 Function NFC:
To enable communication with an NFC device, the door handle electronics CA+NFC has a highly integrated transceiver IC for contactless communication at 13,56MHz for automotive applications. This reader has a gateway function, the possibility to buffer required data and various diagnostic information can be provided as well.
The data is transferred to the NFC device according to ISO/IEC 14443-A. The data transmission to the vehicle is realized via CAN-Bus interface. ECP according to Car Keys specification is implemented to communicate also with Apple NFC devices.
In LPCD mode the door handle electronics checks the magnetic field for amplitude or phase change. This LPCD polling takes place in adjustable interval lengths.
1.3 Electronic design
1.4 Detection areas
1.5 Pinning
| Connector pin | Signal | Color (Banana connector) |
| 1 | Kl.30 | Red |
| 3 | Kl. 31 (GND) | Black |
1.6 Technical data
– Temperature:
- Operating temperature range: -40°C to +70°C
- Storage temperature range: -40°C to +85°C
- Repainting temperature: 110°C for 1h, 130°C for 0.25h
– Operating voltage range:
- CAN 7V – 18V (± 2%)
- Function 9V – 16V (±2%)
– Quiescent current:
- Standby-Mode max. 350µA
- Aktiv-Mode < 250mA
– Measuring cycle:
- NFC 100ms (adjustable up to 500ms)
- NFC-LPCD pulse: 40µs
– Working frequencies:
- NFC carrier frequency 13.56MHz
– Baud rates:
- CAN 500kBit/s
– NFC:
- Antenna Aero B FLUSHNFC included in the PCBA
- Mode NFC initiator in Reader-Writer Mode
- Communication Role Proximity Coupling Device (PCD)
- Communication Range ≤ 3cm
- Standard ISO/IEC 14443 Type A + Apple ECP
- Type of modulation 100% ASK modified Miller (PCD to PICC) Load Modulation OOK (PICC to PCD)
- Bit rate 13.56MHz/128 ≈ 106kBaud
- Frequency 13.56MHz +/- 7kHz
- Crystal Stability +/- 30ppm
– NFC:
- Antenna Aero B FLUSHNFC included in the PCBA
- Mode NFC initiator in Reader-Writer Mode
- Communication Role Proximity Coupling Device (PCD)
- Communication Range ≤ 3cm
- Standard ISO/IEC 14443 Type A + Apple ECP
- Type of modulation 100% ASK modified Miller (PCD to PICC) Load Modulation OOK (PICC to PCD)
- Bit rate 13.56MHz/128 ≈ 106kBaud Frequency 13.56MHz +/- 7kHz
- Crystal Stability +/- 30ppm
1.7 Operating modes for Homologation
– OP1 (Application Mode):
o Door handle in normal application Polling-Mode. Capacitive sensors and NFC-Field will be triggered cyclically, CAN/Kessy interface is not active.
– OP2 (Radiated CW-Mode + Modulation):
o Door handle in Active-Mode. Capacitive sensors are disabled. NFCContinuous-Wave-Mode + Random Modulation Type A is activated permanently and Kessy interface line is not active
- Radiated Continuous Wave (min. 5 minutes)
- Radiated Continuous Modulation (min. 5 minutes)
– OP3 (Device Monitoring Mode):
o Door handle in Active-Mode. Capacitive sensors are disabled. NFCContinuous-Wave-Mode +Request Type A is activated cyclically, Kessy interface line is not active. NFC communication response can be checked via LED.
▪ Radiated Continuous Receive (min. 5 minutes, optical response at reception of a wanted telegram)
Only for information:
– Conducted SMA samples:
- Every connection directly at the antenna will generate a major distortion of the main frequency due to R, C and L values parallel to the NFC antenna.NFC filter will be detuned and resonance maximum will be no longer at round about 13,56MHz. Therefore it is not possible to test with conducted SMA samples. Also known from other projects with NFC door handle.
▪ Conducted (with SMA jack) Continuous Wave (min. 5 minutes)
▪ Conducted (with SMA jack) Continuous Modulation (min. 5 minutes)
Declaration of Conformity, product Label
2.1 Radio equipment authorization to FCC in USA
FCC ID: YGOFLUSHNFC
The transmitter will be supplied as an original equipment device to the car manufacturer.
According to 47 CFR 15.19 (labelling 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:
- This device may not cause harmful interference, and
- 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.
2.2 Radio equipment authorization to RSS-210 in Canada
IC ID: 4008C-FLUSHNFC
The transmitter will be supplied as an original equipment device to the car manufacturer.
According to RSS-210 (labelling requirements) the car manufacturer will print the following text in the appropriate User’s Manual of the car:
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
Usually this is followed by the following RSS caution:
Any changes or modification not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
Regulatory Information
3.1 USA:
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
Any changes or modification not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
3.2 Kanada:
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
Any changes or modification not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
3.3 Taiwan
User Manual for homologation
8000.499 VW413 Aero B
22 – 02 – 2024, PD-A (Template Rev. 000)
Documents / Resources
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Huf H32 Flushnfc Reneval of NFC Sensor [pdf] User Manual H32, H32 Flushnfc Reneval of NFC Sensor, Flushnfc Reneval of NFC Sensor, Reneval of NFC Sensor, NFC Sensor, Sensor |