V4 CS_B引脚的状态是否重要？

嘿，我认为这与Project-NaviGator中的比特流生成设置有关...我已经设置为持续存在且CS_B保持为SelectMAP引脚...如果我设置为持续关闭，则CS_B成为输入
/输出引脚可用于其他目的...如果将persist设置为on，则必须确保CS_B在配置后处于已知状态...如果接地或0，则启用SelectMAP接口。
..如果设置为高或1则接口被禁用...因此请确保禁用接口，否则您可以启动中止序列。
查看关于非连续SelectMAP数据加载的V4配置用户指南UG071部分.HTH !!!
-  = G。
ZOD =  -



以下为原文

Hey, I think this has something to do with your bit-stream generation settings in Project-NaviGator... I had mine set to persist and CS_B stays as a SelectMAP pin... if I set persist off, then CS_B becomes a input/output pin that you can use for other purposes... if you set persist as on, then you have to make sure CS_B is in a known state after configuration... if tied to ground or 0 then the SelectMAP interface is enabled... if set to high or 1 then the interface is disabled... so make sure the interface is disabled, or else you may start the abort sequence. Check out the V4 configuration user guide UG071 section on Non-Continuous SelectMAP Data Loading. HTH!!!-=G. ZOD=-

你确定？
Virtex 4数据表没有列出CS_B，因为它可以转换为I / O引脚，而是将其列为专用引脚。
我原以为这意味着它的功能是不可改变的。



以下为原文

Are you sure? The Virtex 4 datasheet does not list the CS_B as being able to be turned into an I/O pin, rather it lists it as a dedicated pin. I had thought this to mean its function was unalterable.

cs-b引脚是专用的，但重点是如果你没有使用PERSIST选项，你不必担心在启动完成后cs_b引脚处于什么状态。
请注意，某些选项（例如等待dcm在完成启动之前锁定）可能会显着延迟启动结束。消息由roym编辑于08-15-2007 08:19 AM
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以下为原文

The cs-b pin is dedicated, but the main point is that if you are not using the PERSIST option you don't need to worry what state the cs_b pin is in after the startup is complete.  Note that some options such as wait for dcm's to lock before finishing startup can delay the end of startup significantly.


Message Edited by roym on 08-15-2007 08:19 AM----------------------------------------------------------------------------
Don't forget to reply, kudo, and accept as solution
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我不记得在帖子中提到回读了。
如果设置PERSIST开关，则D0-D8引脚不再用作IO（配置后），用于回读。
还要确保正确切换BUSY和CS_B以避免菊花链式SelectMAP配置中的中止情况.- David



以下为原文

I don't recall any mention of readback in the post.  If you set the PERSIST switch, your D0-D8 pins no longer function as IO (after configuration) and are used for readback purposes.  Also ensure that you toggle BUSY and CS_B properly to avoid an abort condition in a daisy-chained SelectMAP configuration. -David

甜。
这对我很有帮助。
谢谢。



以下为原文

Sweet. That helps me alot. Thanks.