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PLilj.1
Explorer
Oct 29, 2021 3:52 PM UTC
Question

Does STM32WB55 have embedded pull-up resistor on USB_DP?

In AN4879 FAQ it is stated to check "Table 3. USB implementation in STM32 devices" whether the USB_DP line has an embedded pull-up resistor.

STM32WB55 is not in that list. Can you confirm if the STM32WB55 has embedded pull-up resistor on USB_DP or not?

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2 replies

TDK
Oct 29, 2021 4:09 PM UTC

Per the reference manual, it has an embedded resistor on USB_DP.

USB connect / disconnect capability (controllable embedded pull-up resistor on USB_DP line)

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垒垒.1
Associate
Nov 6, 2021 3:44 AM UTC

YES!the STM32WB55 has embedded pull-up resistor on USB_DP.