Fs6503 and FS0B

[347996379]

Hi,Sun

Now, my Fs6503 feed the dog has been normal, I use in my schematic FS0B this pin to control my contactor, at first I didn't notice this place, this pin as long as electricity output low level, whether in the debug mode or normal mode, so that I contact directly is locked, can you help me points for this reason?I have checked the reasons why FS0B may be pulled down in the manual, as shown in the following pictures. I have confirmed that there are no problems with the first three, and the remaining ones are all in a vague state. Please analyze the reasons in combination with my schematic diagram.

Maybe I should ask you how I can pull the FS0B pin higher after the initialization of the fs6503 is complete.

[guoweisun]

HI！

FS0B的电路看不清楚，能发清楚的图片吗关于FS0B的电路！

[347996379]

麻烦帮我看看问题出现在哪里，结合上面的问题

[guoweisun]

1:No more issue with your schematic.

2: For the release FSXB please read detail information procedure in page57 attached.

[dbddbd]

你好，所谓的附件在哪里呢？您这边可以上传一下吗

[347996379]

Hi,sun

I would like to know whether the PIN of FS0B remains low after power on or reset.The software package you provided only has the function of releasing FS0B, but does not have the function of raising it.In addition, in debug mode, the output of FS0B is low or high.

[guoweisun]

对的，每次power on reset  FS0B都是默认low的无论再哪个模式下面，所以我才给您release的方法。

[347996379]

非常感谢！现在我已经能够释放FS0B这个管脚了，由于这个管脚我是用来做功能安全的，当CPU不能运行的时候，并停止了喂狗，在fs6503内部fs0b这个管脚有没有主动拉低的机制

[witness]

您好，我现在也遇到了和你之前一样的问题，FS0B一直拉低，请问你是怎么拉高的呢？实现方法可以告知一下吗？非常感谢！

[guoweisun]

您用公司的邮箱提 ticket过来，用个人邮箱不能提交case只能再community上提问

Home

[witness]

你好，孙工

你这边能帮忙先告知下release FS0B方法吗？

[guoweisun]

不同的情况下有不同的处理方法，您先提交ticket吧假如是163的邮箱是不能提交ticket的，您要用公司的邮箱

[witness248]

I have created ticket as below

Home\ Product Forums \Other NXP Products\ FS6513 FS0B can not be release

[guoweisun]

这个SF_OUTPUT_REQUEST register寄存器的FS0B_REQbit 设置成1就是asserted low.

[347996379]

可能你没明白我的意思，上面我说到CPU在完全死掉的情况下，主cpu还怎么能去读写sbc的寄存器？在这个时候sbc有没有主动释放fs0b的机制

[guoweisun]

CPU都死掉了怎么可能去releaseFS0B!

[347996379]

意思是这个管脚不能当做安全功能管脚用了？CPU非正常情况下，fs0b管脚不能锁住控制开关

[guoweisun]

如果你不去喂狗，就会产生错误FS0B，这个时候FS0B就会被asserted.你说的锁住控制是怎么理解？

[347996379]

发送错误的时候，FS0B的电平被翻转

[guoweisun]

有错误是会翻转啊，前提是release了FS0B,这不就是安全功能吗？

[347996379]

明白了，谢谢