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In FS6500 SBC, need to close S1 switch while releasing FSxB pins?

Question asked by Vaibhav Sharma on Apr 1, 2019
Latest reply on Apr 2, 2019 by Dennis Zeng

The S1 switch between VPU_FS pin & Vpre shall be closed under which circumstances while releasing FSxB pins? As seen in the diagram of FS1B activation, switch S1 when closed, connects the Vpre & VPU_FS.

 

If I close the S1 switch from SF_OUTPUT_REQUEST register to release the FSxB pins, shall I again open S1 to request the assertion of the backup delay of FS1B???

 

Thanks in advance.

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