The Kinetis family of microcontrollers include system security and flash protection features that can be used to protect code and data from unauthorized access or modification. This application note discusses usage of the security and flash protection features available on the Kinetis family processors. The chip security and flash protection features controlled using the flash configuration field will be covered in this application note.

In embedded systems, resources are often limited and getting the best possible performance out of those resources can be critical. Although the idea of performance and low power might seem contradictory, the ability to perform a task quickly and then enter a low power mode can lead to an overall reduction in system power consumption. Therefore, almost any system can benefit from efforts to improve performance.

Freescale’s FXTH87xx consist of complex system-on-chip products that contain a pressure sensor, a Radio Frequency (RF) transmitter, a Low Frequency (LF) receiver, an 8-bit S08 microcontroller (MCU), and may contain one or two axis accelerometers, all in one package. As with most S08 solutions, users must program the MCU with their program, but Freescale already ships low-level drivers, as well as compensation routines, within each part. In order to exploit these routines, the developer must be familiar not only with the MCU architecture, but also with the in-flash firmware. The aim of this document is to fast-track the learning curve of the latter part for someone that is already cognizant of the former.

这是TPMS设计技术与难点解析，值得对TPMS有兴趣的朋友下载

在本系统设计中，采用了射频无线通信方式建立TPMS系统，实现了对汽车轮胎的压力与温度的实时检测。

ECE R64的翻译版本。欧盟第64号法规，规定轮胎压力监测系统的法规和试验要求

胎压监测技术,很详细。基于SP37 应用笔记。大家可以参考设计。

TPMS系统由轮胎压力传感器和接收机组成。轮胎压力传感器选用MicrochiP公司的PICl6F628A低功耗8位MCU,压力传感器选用英飞凌的SPl2,射频IC选用Nordic公司的nRF40l。

汽车胎压监测系统的开发设计,硬件设计，软件设计。

TPMS是汽车轮胎压力监视系统 “Tire Pressure Monitoring System”的英文缩写，主要用于在汽车行驶时实时的对轮胎气压进行自动监测，对轮胎漏气和低气压进行报警，以保障行车安全，是驾车者、乘车人的生命安全保障预警系统。