| commit | dd3a2f0bc374c6d685195163dcdefc861c549b4a | [log] [tgz] |
|---|---|---|
| author | Pirmin Vogel <vogelpi@lowrisc.org> | Tue May 12 14:59:50 2020 +0200 |
| committer | Eunchan Kim <me@eunchan.kim> | Wed May 13 09:48:07 2020 -0700 |
| tree | 862110eb954a17ef1e64a986a96338f6e3d015c0 | |
| parent | fe6863b0f1c3ea1c73310ab017b5d19f8fbd92eb [diff] |
[usbdev] Add reference signals for synchronization of USB clock This commit adds two new outputs to usbdev: - `usb_ref_pulse_o`: indicates the reception of a start of frame (SOF) packet, sent by the host every 1 ms. - `usb_ref_val_o`: indicates if the `usb_ref_pulse_o` signal is valid. This information can be used as a reference to synchronize the USB clock with the host. Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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