Vbb in RTC

[lpcware]

Content originally posted in LPCWare by salamlora1 on Tue May 06 03:00:16 MST 2014
Vbb in RTC
Hi I’m using battery backup in the circuited same as below
[img]http://upload7.ir/imgs/2014-05/11257341680223526405.bmp[/img]
But in user Manuel say
[img]http://upload7.ir/imgs/2014-05/59843929120587364092.bmp[/img]
Is it means I can the below circuit
[img]http://upload7.ir/imgs/2014-05/60260409669471752171.bmp[/img]
Is it correct???? :D

[lpcware]

Content originally posted in LPCWare by salamlora1 on Sun May 18 23:06:15 MST 2014
Ops
I’m sooooo sorry
I’m not mean don't trust a R2D2 unit I’m to happy to fine a forum with this guise
And it’s for my poor English :(    (Shame one me)
At last I’m apologize to R2D2
And another apologize to checking this comment and answering to this comment
answering to this post

[lpcware]

Content originally posted in LPCWare by R2D2 on Thu May 08 04:54:57 MST 2014

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Quote: askar
I wonder why in some famous Kit's Schematic such as Embedded Artist and others,
Vbat is used in a manner as presented by my friend "salamlora1"....

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A lot of MCUs don't have this included diodes (especially older types) and propably a lot of new schematics are just a copy   :O  of older schematics (or used for several different MCU)...

[lpcware]

Content originally posted in LPCWare by askar on Thu May 08 04:29:09 MST 2014

Hi,

I wonder why in some famous Kit's Schematic such as Embedded Artist and others,
Vbat is used in a manner as presented by my friend "salamlora1".
here i thank from R2D2 and MarcVonWindscooting for their help.

Best Regards,
Askar

[lpcware]

Content originally posted in LPCWare by MarcVonWindscooting on Wed May 07 14:39:22 MST 2014
??
You don't trust a R2D2 unit ?

The MCB4300 Eval board (schematic available on the net) has Vbat connected directly, too.

List of schematics

[lpcware]

Content originally posted in LPCWare by salamlora1 on Wed May 07 05:49:17 MST 2014
Thx for your answers
Yes it is the Vbat
I want to know any one experience of using this circuit
Especially i want to know the answers of the nxp engineers :D

[lpcware]

Content originally posted in LPCWare by R2D2 on Tue May 06 07:15:54 MST 2014

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Quote: salamlora1
Is it correct???? :D

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If your 'VBB' is User Manual VBAT, of course...