电路图比较复杂啊
好,支持一下!
看看新的原理图先,可能的话买一套。
很好,支持论坛发展
:):):):):):):):):)
没多少装备,折腾不起硬件。很希望能增加spi flash的脱机对拷功能,觉得挺实用的
You said this situation should note down, and now the chip control line signal> 2.0v on it
but the old product may be what you said, to find information look
thank you
You said this situation should note down, and now the chip control line signal> 2.0v on it
but the old product may be what you said, to find information look
thank you:(:(
rtindia 发表于 2013-6-30 05:24 static/image/common/back.gif
You said this situation should note down, and now the chip control line signal> 2.0v on it
but the ...
你说得对,vdd=5v时2.0v确实是个比较合理的分割点,但是对于vdd为3.3v或2.5v时就比较难决断了,特别是2.5v,其分割点在1.2v,因而很容易引起电平错误。因此5v和3.3v可以实现很好的兼容,不需要特别的电平处理电路,如需要支持2.5v供电的,必须另外提供电平转换。
谢谢提醒
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