NXP LPC3240+JN5168智能家居网关方案

 Two I2C-bus interfaces with standard open-drain pins. The I2C-bus interfaces support single master, slave, and multi-master I2C-bus configurations.
 Two I2S-bus interfaces, each with separate input and output channels. Each
channel can be operated independently on three pins, or both input and output
channels can be used with only four pins and a shared clock.
 Additional peripherals:
 LCD contr绕线电感oller supporting both STN and TFT panels, with dedicated DMA
controller. Programmable display resolution up to 1024  768.
 Secure Digital (SD) memory card interface, which conforms to the SD Memory
Card Specification Version 1.01.
 General Purpose (GP) input, output, and I/O pins. Includes 12 GP inputhttp://www.ruishen.net/贴片电感器 pins, 24 GP output pins, and 51 GP I/O pins.
 10-bit, 400 kHz Analog-to-Digital Converter (ADC) with input multiplexing from three pins. Optionally, the ADC can operate as a touch screen controller.
 Real-Time Clock (RTC) with separate power pin and dedicated 32 kHz oscillator.
NXP implemented the RTC in an independent on-chip power domain so it can
remain active while the rest of the chip is not powered. The RTC also includes a 32-byte scratch pad memory.
 32-bit general purpose high-speed timer with a 16-bit pre-scaler. This timer includes one external capture input pin and a capture connection to the RTC clock.
Interrupts may be generated using three match registers.
 Six enhanced timer/counters which are architecturally identical except for the peripheral base address. Two capture inputs and two match outputs are pinned out to four timers. Timer 1 brings out a third match output, timers 2 and 3 bring out all four match outputs, timer 4 has one match output, and timer 5 has no inputs or outputs.
 32-bit millisecond timer driven from the RTC clock. This timer can generate interrupts using two match registers.

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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