VSUB CDC communication on nrf52840 holyiot

RE: VSUB CDC communication on nrf52840 holyiot

Anmol — Tue, 10 Sep 2019 12:55:45 GMT

Thank you awneil.
i appreciate your help.

VDD and VDDH are shorted on the module holyiot.

question is solved

RE: VSUB CDC communication on nrf52840 holyiot

awneil — Thu, 05 Sep 2019 10:36:22 GMT

Really?

I read:

"As a consequence, both VBUS and either VDDH or VDD supplies are required for USB peripheral operation."

https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html?cp=3_0_0_4_2_1#power_usb_supply

But you still need to confirm with holyiot how their hardware design impacts this.

RE: VSUB CDC communication on nrf52840 holyiot

Anmol — Thu, 05 Sep 2019 10:29:08 GMT

Power supply mode

they tell not to connect.

RE: VSUB CDC communication on nrf52840 holyiot

awneil — Thu, 05 Sep 2019 10:00:11 GMT

What does the Product Specification tell you?

RE: VSUB CDC communication on nrf52840 holyiot

Anmol — Thu, 05 Sep 2019 09:51:46 GMT

Can you tell for nRF52480 chip do i need to supply vdd with 3v and VBUS 5v , D+ , D- , ground to commuincate over USB CDC. or can it be done without supplying 3v to VDD pin

RE: VSUB CDC communication on nrf52840 holyiot

awneil — Thu, 05 Sep 2019 09:38:11 GMT

[quote userid="83120" url="~/f/nordic-q-a/51787/vsub-cdc-communication-on-nrf52840-holyiot"]holyiot [/quote]

You mean this: http://www.holyiot.com/ ?

That's an independent 3rd party - nothing to do with Nordic.

For specific questions about their products, you need to contact them!

https://devzone.nordicsemi.com/f/nordic-q-a/51583/asking-how-to-load-firmware-on-holyiot-nrf52832-dongle/207132#207132