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如果它们在MCLR pin和电源引脚到控制器之间的电压不同,会发生什么?
以上来自于百度翻译 以下为原文 What will happen if their is an differ in voltage between MCLR pin and POWER SUPPLY pin to the controller means..? |
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8个回答
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只要它在数据表中列出的规格内,它就可以工作。
以上来自于百度翻译 以下为原文 As long as it is within the specs listed in the data sheet, it will work. |
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如果电压差在正确的方向上足够大,PIC就会复位。如果电压差在错误的方向上足够大,PIC就会冒烟。眨眼:真正的问题是什么?
以上来自于百度翻译 以下为原文 If the voltage difference is great enough in the right direction the PIC will reset. If the voltage difference is great enough in the wrong direction the PIC will smoke. wink: What's the real question? |
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大多数8位PIC将重新设置任何方向上的变化(区分LVP与HVP模式),如果任何方向上的变化幅度大于它们所能接受的话,则会吸烟。:)
以上来自于百度翻译 以下为原文 Most 8-bit PICs will reset with the change in any direction (which distinguish LVP from HVP mode), and then will smoke if the magnitude of change in any direction is greater than they can take. :) |
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让假设…MCLR引脚具有4.7V和电源引脚3.5 V由于硬件设计不当意味着将发生在PIC控制器..是否会工作异常或其他东西…
以上来自于百度翻译 以下为原文 Let assume...MCLR pin having 4.7V and POWER SUPPLY pin having 3.5V due to improper hardware design means what will happen in PIC controller..whether it will work abnormally or something else.... |
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由于MCLR pin被拉到12V的高压编程,我不认为这会造成任何损害。它可能导致异常操作,甚至可能导致闪光灯的部分被改变或擦除(虽然我怀疑它)。
以上来自于百度翻译 以下为原文 Since the MCLR pin is pulled up to 12V for HV programming, I don't think that would cause any damage. It might cause unusual operation or even possibly cause parts of flash to be changed or erased (although I doubt it). |
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VPP对于较新的PIC来说比12V低,对于旧的PICS来说比12V要高,所以重要的是指定哪一个PIC正在被谈论。这就是为什么之前的响应仅仅提到“数据表”,因为OP的责任是检查相关的数据表,如果它们不显示WHI的话。他们正在打听。
以上来自于百度翻译 以下为原文 Vpp is lower than 12V for newer PICs, and higher than 12V for older PICs, so it's important to specify WHICH PIC is being talked about. That's why earlier responses just referred to "the data sheet", as it is the OP's responsibility to check the relevant datasheet if they are not going to reveal which PIC they are asking about. |
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一些设备要求MCLR在VDD之上只有1.5V,以便重置并进入编程模式。在这种情况下,您的硬件设计需要更正。请阅读您正在使用的设备的编程手册。它应该指定MCLR上的最小电压以进入编程模式。
以上来自于百度翻译 以下为原文 Some devices require MCLR to be only ~1.5V above Vdd for it to reset and enter programming mode. In this case your hardware design needs to be corrected. Please read the programming manual for the device you are working with. It should specify the minimum voltage on MCLR to enter programming mode. |
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理论上,对于具有HVP的PIC,需要8到13 V(取决于PIC)进入编程模式。在实践中,4.7VE就足够了。许多图片没有HVP。这些图片可能被损坏4.7V。
以上来自于百度翻译 以下为原文 In theory, for a PIC with HVP, you need 8 to 13 V (depending on the PIC) to enter programming mode. In practice, 4.7V may be enough. Many PICs don't have HVP. These PICs may be damaged by 4.7V. |
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