LPC43xx USB1_DP/DM Add an external series resistor of 33r

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LPC43xx USB1_DP/DM Add an external series resistor of 33r

511 次查看
skysky
Contributor III

i find the spec. about UBS1_DP/USB1_DM need add an external series resistor of 33r.

QQ截图20170719214051.png

however,the application about USB1,ex. MCB4300-board,there is no resister added.

So ,the resister is Necessary?

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430 次查看
soledad
NXP Employee
NXP Employee

Hi,

Yes, it is necessary for USB1. Please check the OM13088: LPCXpresso4367 Development board as example.

http://www.nxp.com/downloads/en/schematics/LPCX43xx_18xx_V3_Schematic_Rev-B.pdf 

pastedImage_4.png


Have a great day,
Soledad

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430 次查看
skysky
Contributor III

HI soledad:

  thank you for your reply

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