Forums - Can't find SWREG_FB pin

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Can't find SWREG_FB pin
michael.burm
Join Date: 30 Oct 17
Posts: 12
Posted: Wed, 2017-12-20 02:40

We are busy drawing the schematics and layout for a product with the QCA4010. 

In 80-Y9047-3 Rev. J, table 2.1, the following is mentioned regarding pins B11,B15,B26,B31,B49:

"Digital 1.2 V power supply, should be connected to the SWREG_FB "pin."
 
However, this "SWREG_FB" is not found anywhere else in the pin specification. Does it exist on the current device and should it be connected somehow? We didn't find any info in the example schematics either.
 
Sincerely,
 
Michaël Burm
 
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jbhanu Moderator
Join Date: 6 Feb 17
Posts: 80
Posted: Thu, 2017-12-21 08:58

Dear Michael,

If the design is based on QCA4010 1x1 2G SB iPA, then the SWREG_FB_DVVD12 pin should be left unconnected/floating, provided B1, B11, B15,B26,B31,B49 are connected to DVDD12 according to the schematics. 

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michael.burm
Join Date: 30 Oct 17
Posts: 12
Posted: Fri, 2017-12-22 07:24

Thanks for the reply, could you point out what physical pin (Bxx/Axx) SWREG_FB_DVVD12 is? It's not mentioned in my version of the device spec(80-Y9047-3 Rev. J).

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michael.burm
Join Date: 30 Oct 17
Posts: 12
Posted: Wed, 2018-01-03 02:24

Nevermind, I found it to be pin B12, the description has been changed from SWREG_FB to NC as mentioned in the revision history. However, the pin description list still mentions it should be connected, that's what caused the confusion.

Sincerely,

Michaël Burm

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