AWR1642: How to connect VPP pin

JohnH

Part Number: AWR1642

On AWR1642, there is a pin named VPP (L13 ball) in the datasheet and it says it is a "Voltage supply for fuse chain". Does it need to be connected to a power supply?

over 8 years ago

0 JohnH over 8 years ago

TI__Mastermind 21295 points

Normally, the VPP pin should not be connected to a power supply. Instead, it should be left not connected.

Regards,
John

0 Vaibhav Mahimkar over 8 years ago in reply to JohnH

TI__Mastermind 23725 points

Thank you John.

0 Wesley He over 8 years ago in reply to JohnH

TI__Expert 6205 points

John,

Is that means we only need to connect a 0.1uF to decap at this VPP pin and the LDO which provide 1.7V can be removed to reduce the cost of BOM in customer's design?

Regards,
Wesley

0 Vivek Dham over 8 years ago in reply to Wesley He

TI__Guru 58035 points

Hello Wesley,
For the regular AWR1642 device variant the VPP pin can be left unconnected (no supply required).

Regards,
Vivek

0 Nomo over 8 years ago in reply to Vivek Dham

Guru 16800 points

Hello Vivek-san,

Could tell me the purpose of VPP pin?
My customer wants to know what case is the pin supplied power.

Best Regards,

Nomo

0 Vivek Dham over 8 years ago in reply to Nomo

TI__Guru 58035 points

Hello Nomo,
In the future we will have a secure variant of the AWR1642 device where the user can burn his own key for encryption. In that device the user would have to feed 1.7V on this pin to burn his own key.

regards,
Vivek

0 Nomo over 8 years ago in reply to Vivek Dham

Guru 16800 points

Hello Vivek-san,

Thank you for your reply.

I can understand.

Best Regards,

Nomo

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AWR1642: How to connect VPP pin