lpcware

What are the minimum hardware (pin) lines required for host (USB1) [No OTG] on the 1778?

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by MikeSimmonds on Mon Sep 24 01:57:56 MST 2012
On our custom board, what are the minimum processor pins I need to connect to get a USB host port (USB1) I don't care about over current or power enable as I intend to connect 5V permanently to the type A connector's Vbus pin.

I'm only ever going to plug in a USB flash drive for firmware update.

The UM10470 appears to imply that USB1_PWRD must be configured. Is this the case (I don't want any OTG stuff). If needed, can I tie to 5V (or 3.3V?) Or can I just enable the built in pull up?

Does the cpu USB controller detect device physical insertion? (and give me an interrupt so that on receipt I go do an Enum to find out what the device is).

Or do I have to poll now and then and do speculative Enums until one suceeds. If this case applies, do I have to configure USB_PWRD? [because I'd really not want to have to move what is currently on that particular pin.]

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