3 ms·
I heard you can manually disable certain pins to do this. Or there may be cables designed for digital forensics that already have this done.
by Melatonic 5y ago
I heard you can manually disable certain pins to do this. Or there may be cables designed for digital forensics that already have this done.
- gumby 5y agoI'm not sure how that could work in USB C. You can definitely do it for USB A, and a lot of cheap charger cables do this to reduce BOM. But with USB C, the data lines are used for configuration negotiation (including PD) before being turned over to client data transmission.
- duskwuff 5y ago> But with USB C, the data lines are used for configuration negotiation (including PD) PD negotiation takes place over the CC pins, not over the USB data pins. This, and much more, is explained in TI's document "A primer on USB Type-C and USB Power Delivery Applications and Requirements": https://www.ti.com/lit/wp/slyy109a/slyy109a.pdf https://www.ti.com/lit/wp/slyy109a/slyy109a.pdf
- gumby 5y agoThanks. I lost my access to the standard itself a few months ago.
- Melatonic 5y agoThis link does not work any more - any idea if there is an updated one?
- duskwuff 5y agoLooks like TI just updated it a few days ago: https://www.ti.com/lit/wp/slyy109b/slyy109b.pdf https://www.ti.com/lit/wp/slyy109b/slyy109b.pdf