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keil pack cmsis 5.7.0 keil官网下载慢，打开keil- 项目- 管理-安装包，再直接拖到进去就可以了。

5管的电话线路偷电电路，高性能。挂机状态从线路偷电，可以实现免用电池。

The COG&SOG View displays the GPS speed and direction in a graphical form. There are two measurement systems can be shown: Metric (KM) or Impearl (Mile). You can select the unit of measurement in the Unit selection box on Function Bar by click the item of KM or Mile

最新君正公司JZ4750资料 Jz4750 is a multimedia application processor targeting for mobile devices like PMP, mobile digital TV, smart-phone, and GPS. Incorporate the XBurst ® CPU core based on leading micro-architecture technology, this processor provides high integration, high performance and low power consumption solution for embedded device. XBurst ® is a high performance and power-efficient 32-bit RISC core with 16K instruction cache and 16K data cache, operating at speed up to 360MHz. The SIMD instruction set implemented by XBurst ® core, in together with the on chip video accelerators and Image Processing Unit, provides strong video decoding capability.