AWR1642BOOST: Series resisters for the QSPI FLASH on the schematic and on AWR1642BOOT

Hitoshi Sugawara

Mastermind 19980 points

Part Number: AWR1642BOOST

Hi Experts,

There are series resisters 33.2 ohm for the QSPI FLASH on page 73 in www.ti.com/lit/swrs203 datasheet.

Could you please let me know the purpose of the resisters?

Is it necessary 33.2 ohm? It is E48 type.

I would like to remove or 33 ohm instead.

Thank you for your kind check.

Best regards,

Hitoshi

over 7 years ago

0 Akash Gondalia over 7 years ago

TI__Guru 50240 points

Hi Hitoshi,

I've asked an hardware expert to look at your question and someone should have an answer for you on Monday.

Cheers,
Akash

0 Hitoshi Sugawara over 7 years ago in reply to Akash Gondalia

TI__Mastermind 19980 points

Hello Akash,
Could you plesae update for this?
Best regards,
Hitoshi

0 Vivek Dham over 7 years ago in reply to Hitoshi Sugawara

TI__Guru 58035 points

Hello Hitoshi San,
The series resister is to provide better series impedance match and reduce ringing in the signal. If the traces are kept very short then these can be removed.

Regards,
Vivek

0 Hitoshi Sugawara over 7 years ago in reply to Vivek Dham

TI__Mastermind 19980 points

Hi Vivek,
Thank you very much for your explanation.
Best regards,
Hitoshi

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AWR1642BOOST: Series resisters for the QSPI FLASH on the schematic and on AWR1642BOOT