Smart car evolution starts from the window
When the entire automotive industry is keen on driverless cars, we can't avoid the embarrassing fact that there is currently no way to do it, and it may not be able to do well in the next decade or so. But from the demonstrations of various unmanned concept cars, it is not difficult to find that one of the most important factors of driverless driving is that key components can work "spontaneously". It’s a good idea to “make the horses and horses move, grain and grass firstâ€. Instead of radically redefining the unmanned cars from start to finish, it’s better to let some components get smart, such as powertrain, car infotainment, dashboard, safety and bodywork. Applications such as automotive electronic systems. As the electronic frame of the car, the body electronics can be used as the starting point for the evolution of smart cars.
The body electronics system covers a wide range of applications inside the cockpit, covering comfort, safety and security functions as well as high performance computing and in-vehicle networking. Freescale's extensive portfolio of 8-bit, 16-bit and 32-bit microcontrollers (MCUs) is at the heart of this class of applications, with a wide range of analog components to provide superior power management and control. With comprehensive support, Freescale offers complete solutions for body electronics applications. Body electronics applications include: central gateway/in-vehicle network, door, window lift and seat control, entry-level body control modules, HVAC, high-end body control modules, lighting and wireless charging.
Today's protagonist is the window, although the window is ordinary, but it is often the key escape route in the most critical moments; in addition, the window has become another big "child killer", the importance of its intelligence can be seen. Currently, the main demand for smart windows is focused on anti-pinch and window jam detection. Window anti-pinch technology has been widely applied to various grades as an early development of child safety protection technology, but in China, this technology is often only applied to the front window, but ignores the rear row that children often ride. And the skylight for play.
S12VR window lift solution to improve safety and quality
Freescale's S12 MagniV S12VR mixed-signal microcontroller (MCU) portfolio simplifies automotive engineering by providing intelligent, optimized, integrated, high-precision analog components and proven S12 MCUs. The S12VR series is the first system-in-package device based on the LL18UHV processing technology in the portfolio for automotive and industrial anti-pinch window lift systems, electric sunroof modules, LIN-controlled relay drives, smart actuators, relay-based DC motors and Other space-constrained relay DC motor control applications.
The Freescale StarterTRAK TRK-S12VR-WLFT low-cost reference design demonstrates the main advantages of the S12 MagniV S12VR 16-bit MCU for window lift and relay-based motor control. The StarterTRAK has a compact design with fewer external components, can withstand higher voltages, and takes up less space. The solution drives a relay-based DC motor and achieves anti-pinch and window jam detection with a Hall effect encoder. The relay is diagnosed by the HVI wake-up pin. Includes LIN communication capabilities for managing status and diagnostic reports. Target applications include power window systems, sunroof systems, zoning systems, and relay-based DC motor control.
Figure 1 S12 MagniV window lift and relay-based DC motor control reference design circuit diagram
The software provided by the reference platform can be used as a starting point for the DC motor of the window regulator relay through the anti-pinch detection. It has HAL and MCU initialization, automatic reversal procedures, anti-pinch detection, speed and direction processing, self-calibration and other basic functions required for this application.
Figure 2 Freescale TRK-S12VR-WLFT reference design board
Withstand high voltage up to 750V (IEC/EN standard)
UL 94V-2 or UL 94V-0 flame retardant housing
Anti-falling screws
Optional wire protection
1~12 poles, dividable as requested
960 Series Terminal Blocks,Electrical Terminal Strips,Electronic Terminal Blocks,Nylon Terminal Block,ballast terminal blocks
Jiangmen Krealux Electrical Appliances Co.,Ltd. , https://www.krealux-online.com