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Tiva C Series TM4C1294 LaunchPad如何不使用usb线而使用外部电源供电?

Other Parts Discussed in Thread: EK-TM4C1294XL, TPS2052B

不使用usb线连接电源,而通过某个引脚进行供电是否可行?

  • 可以的,EK-TM4C1294XL有三种供电方式,分别是下面三种

    The Connected LaunchPad can be powered from three different input options:
    • On-board ICDI USB cable (Debug, Default)
    • Target USB cable
    • BoosterPack or Breadboard adapter connection
    The JP1 power-select jumper is used to select one of the power sources.
    In addition, the JP3 power jumper can be used to isolate the 3.3-volt output of the TPS73733 from the board’s 3.3-volt rail.
    A TPS2052B load switch is used to regulate and control power to the Target USB connector when the microcontroller is acting in USB host mode. This load switch also limits current to the BoosterPack and Breadboard adapter headers when the JP1 jumper is in the ICDI position.

    你可以直接选择第三种供电,然后外部电压接VCC引脚就好了,注意跳线一定要选择正确。

  • 更改JP1跳线后直接通过引出的排针供电就行吗
  • 是的,不知道你想给直接供电的外部电压是3.3V还是5V。如果是3.3V的话,直接连在3.3V的排针脚上就好了,切记这时候要吧JP3断开,不然外部的3.3V和板子上的3.3V就短接了。如果是5V的话,把JP1的5-6和3-4断开,外部5V接在VBUS和5V上都是可以的。

  • 可以的。您可以看一下用户指南 www.ti.com.cn/.../spmu365c.pdf 的 2.2.1 Power Supplies