NXP LPC3240+JN5168智能家居网关方案

 WatchDog timer clocked by the peripheral clock.
 Two single-output PWM blocks.
 Motor control PWM.
 Keyboard scanner function allows automatic scanning of an up to 8  8 key matrix.
 Up to 18 external interrupts.
 Standard ARM test/debug interface for compatibility with existing tools.
 Emulation Trace Buffer (ETB) with 2048  24 bit RAM allows trace via JTAG.
 Stop mode saves power while allowing many peripheral functions to restart CPU activity.
 On-chip crystal oscillator.
 An on-chip PLL allows CPU operation up to the maximum CPU rate without the
requirement for a high frequency crystal. Another PLL allows operation from the 32 kHz RTC clock rather than the external crystal.
 Boundary scan for simplified board testing.
 User-accessible unique serial ID number for each chip.
 TFBGA296 package with a 15 mmx15 mmx0.7 mm body.

LPC3220/30/40/50应用:

 Consumer
 Medical
 Industrial
 Network control


图1。LPC3220/30/40/50框图

The NXP Internet of Things (IoT) Gateway is an essentialcomponent for connecting everyday wireless-enabled devicesto the wired internet so they can be controlled and monitored.

The powerful ARM9-based host controller runs an OpenWRTLinux operating system, providing an easy-to-use platformfor system development. The software is modular, allowingfor easy customization, including changes to the applicationsoftware. The wireless interface can participate in ZigBeeor JenNet-IP networks. With the addition of a wireless USBdongle, the gateway can participate in a mix of both networks.

Data encryption uses standard internet techniques on thewired interface, and 128-bit AES encryption for wirelesscommunications.

AC-DC开关电源属于A级ITE还是B级ITE? 如题。
沙发

阻焊显影阻焊显影步骤同线路显影。

关于张占松老师《电源设计一书》中的疑惑？


这是正激变压器的Ap法设计公式，感觉怎么算都不对呢？式中的5.4怎么来的？


为什么我算出来就是0.361？
書本供參考，不一定全對

大电流电感

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