Cyclone II在JTAG调试时没用的管脚怎么处理？

NationalSemi · 发表于 2008-1-6 16:10:36

除了时钟、复位和一些IO口外，其它的管脚怎么办呢？
连接到配置芯片的管脚用不用设为高阻态？

fhqmc · 发表于 2008-1-6 18:33:51

只需在setting把未用管脚设为三态输入就行了

NationalSemi · 发表于 2008-1-6 19:04:27

As input tri-stated with bus-hold circuitry
As input tri-stated with weak pull-up resistor
As output driving an unspecified signal
As output driving ground
这几种一般各用在什么场合呢？

Fpang · 发表于 2008-1-6 21:04:02

设置成输入三态就可以了

shjw · 发表于 2008-1-12 15:14:34

呵呵，在Q2软件设定成三态

fire11f · 发表于 2010-7-19 18:55:04

NationalSemi
as input tri-stated with bus-hold circuitry
as input tri-stated with weak pull-up resistor
as output driving an unspecified signal
as output driving ground
这几种一般各用在什么场合呢？
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同2楼，有没有高手能说说输入弱上拉和输入总线保持这2种状态是什么意义，还有他们的应用场合是什么呢？

Cyclone II在JTAG调试时没用的管脚怎么处理？

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