From 580a54658ad27550a1da5cd6077b901a12d447f2 Mon Sep 17 00:00:00 2001 From: Keith Short Date: Fri, 30 Aug 2019 11:32:50 -0600 Subject: doc: Add additional USB terms Add more USB terms to the EC glossary. BUG=none BRANCH=none TEST=none Change-Id: Ibc2c0d43959749d9527de08337f4a83b41a429ce Signed-off-by: Keith Short Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1778634 Reviewed-by: Jett Rink --- docs/usb-c.md | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'docs/usb-c.md') diff --git a/docs/usb-c.md b/docs/usb-c.md index 79b3145bdf..d6327d6dc7 100644 --- a/docs/usb-c.md +++ b/docs/usb-c.md @@ -75,6 +75,16 @@ Modes in the EC codebase. * Downstream Facing Port. The USB Data role that is typical for a host machine (e.g. device running ChromeOS). +* E-Mark {#emark} + * Electronically marked cable. A USB-C cable that contains an embedded + chip in the cable, used to identify the capabilities of the cable. + +* VCONN {#vconn} + * Connector Voltage. A dedicated power supply rail for [E-Mark](#emark) + cables and other accessory functions (such as display dongles, and + docks). VCONN re-uses one of the CC1/CC2 signals to provide 5 volt, 1 + watt, of power. + ## Different PD stacks Right now platform/ec has two different implementations of USB-C PD stack. -- cgit v1.2.1