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As the automotive industry moves towards intelligence and connectivity, Bluetooth niedrige Energie (Bloß) technology has become the preferred core communication technology for systems such as automotive smart keys and on-board access control, thanks to its low power consumption and high adaptability. On-board scenarios impose extremely high requirements on the reliability and stability of hardware. The FSC-BT618V is an automotive-grade BLE 5.2 wireless module built on the Von CC2642R Chip, designed specifically for on-board smart key scenarios. It can be used as a Bluetooth key node in vehicles and also adapt to the low-power Bluetooth communication needs of multiple fields, providing an additional option for a cost-effective automotive-grade Bluetooth solution.

 

Typical Features

  • Compliant with the Bluetooth 5.2 Low Energy specification, supporting core protocols including GAP, Zu/Ziege, SMP and L2CAP.
  • Equipped with a chip certified to AEC-Q100 standards, supporting wide-temperature operation from -40°C to +85°C.
  • Maximum transmit power of +5dBm, communication distance of over 80 meters in an open environment, and receiving sensitivity of -105dBm for 125kbps LE Coded PHY.
  • Standby current of 0.94μA, deep sleep current of 150nA, and peak current of 9.6mA at +5dBm power.
  • Compact package of 13mm×26.9mm×2.2mm, supporting both on-board antenna and external antenna expansion.

 

Application in Automotive Smart Keys

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Der FSC-BT618V can be used as an automotive-grade module option for master or slave nodes of vehicle smart keys, and Feasycom provides a complete solution for it:

 

  • The system consists of a master node module and several slave node modules connected via a bus.

 

  • The master node module can be installed inside the vehicle:

Communicates with the MCU via UART, communicates with mobile phones via BLE, implements Bluetooth protocol stack functions, supports firmware update via UART, and supports Bluetooth connection with synchronous parameter monitoring.

 

  • Slave node modules can be installed on the vehicle doors, with a typical layout of one unit each on the left door, right door and rear bumper:

Performs communication and diagnosis with the MCU via LIN, monitors BLE communication between the master node and mobile phones, implements Bluetooth protocol stack functions, extends support for firmware update via LIN, and supports Bluetooth monitoring mode.

 

  • Integrated with proprietary positioning algorithm service, the algorithm achieves over 95% coverage of the vehicle interior in the PS (Passive Start) zone, approximately 3-meter coverage centered on the left and right door handles in the PE (Passive Entry) zone, as well as optimized UNLOCK and LOCK distance performance.

 

  • Integrated with a proprietary connection authentication method, it enables wake-up and system sleep mechanisms.

Core Functional Advantages

High Compatibility and Expandability

Integrated with an MCU, eliminating the need for an additional main control chip. It is equipped with various interfaces including UART, I2C and SPI, as well as 18 configurable GPIOs, a 12-bit 200KSPS SAR ADC and PWM interfaces. Supporting OTA firmware upgrade, it can flexibly connect with various automotive sensors and control units.

Multi-Scenario Adaptability

Supporting key Bluetooth 5.2 functions such as LE Coded PHY and LE 2-Mbit PHY, and featuring Angle of Arrival (AOA) positioning capability, it meets the requirements of long-distance and high-precision induction for automotive smart keys.

Qualitätssicherung

As a key module solution provider, Feasycom’s software application development system complies with and is certified to the IATF 16949 automotive industry quality system standard, with the entire process from development to testing meeting automotive-grade standards. In der Zwischenzeit, Feasycom provides comprehensive hardware integration guidance including PCB layout and antenna design recommendations.

 

Beyond the application in automotive smart keys, the FSC-BT618V module can be extended to on-board scenarios such as Battery Management Systems (BMS) and Advanced Driver Assistance Systems (ADAS). It also adapts to the low-power Bluetooth communication needs of multiple fields including industry, home and building automation, Einzelhandel, and health & Fitness, serving as another stable and reliable option for applications in scenarios such as industrial logistics tracking and asset management, smart home devices, security systems, and fitness equipment.