TMS320F28377S: Reference Design for F28377s PZP and USB 2.0

Hanno_

Part Number: TMS320F28377S

Hi,

I am looking for a reference Design for the F28377s PZP and its USB connectivity at the Pins 73 (GPIO42) and 74 (GPIO43). The F28377s should work as a device.

My biggest issue is that there is no dedicated VBUS pin and that the Design of the F28379D controll card uses 6 Pins. Furthermore it looks like a host circuit and not a device circuit to me.

There is the "[USB] Thoughts on 2806x USB design considerations" Post. This approach is quite simplisic, are there any design files available which implement that idea?

Kind Regards,

Hanno

over 8 years ago

0 Brett Larimore over 8 years ago

TI__Guru 57255 points

Hi Hanno,

The USB section of the F2837xD controlCARD contains the superset circuitry needed to do most any mode.

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Based on your description, it sounds like you want to know what circuitry to use for a self-powered USB device (without OTG capability).

Going back to the controlCARD schematics, you now would only need three signals between the USB circuitry and the C2000 device (DM, DP, and VBUS). PFLT, EPEN and ID are not necessary. You can then removing U15, U16, and their related passives. The result would be something like the attached.

VBUS is really only needs to be connected to a GPIO. The GPIO would then be monitored via software and its state would be used in the USB software library.