LPC4367 USB Data Pulldowns

[maxschweiner-et]

Are 15kOhm nominal pulldown resistors required on the USB0 DP and DM lines of an LPC4367JET256, or are they included on-die? The reference manual specifically mentions that series termination resistors should not be included, but makes no mention of the pulldowns required by the USB spec.

The Kiel MCB4300 eval kit does not include them, but the LPC4357-EVB eval kit available at element14 does (as well as 47pF capacitors on the data lines).

[Hui_Ma]

Hi,

LPC4367 both USB modules provide internal 15Kohm pull-down resistor to USBx_DP and USBx_DM pins.

There doesn't need to use external 15Kohm pull down resistor for USB host function.

Wish it helps.

Have a great day,
Mike

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------