3 ms·
If the device is dead, then it can't ask the port. This is also tied to fast charging (and whether the device will support it)
by WrtCdEvrydy 6y ago
If the device is dead, then it can't ask the port.
This is also tied to fast charging (and whether the device will support it)
- cortesoft 6y agoCouldn't it provide the low power until the device is powered enough to answer the fast charging question?
- cortesoft 6y agoAlso, wait... if the device is dead, how does the CABLE know that fast charging is supported by the device?
- warricksothr 6y agoI think the link describes this tangentially. The minimal 10mw - 15mw current that high-five allows on a cable that hasn’t completed a handshake is enough to charge the capacitor for secure boot and trident which then can handshake with 0x74 to receive 5v 1a source. When the kernel boots the rest of the handshake process can be completed to increase the current. That’s at least my understanding from the document.