From 9eb19cc1095408f598966a8094ecf6c779a996bc Mon Sep 17 00:00:00 2001
From: higuoxing <higuoxing@web>
Date: Mon, 12 Mar 2018 11:16:37 +0000
Subject: [PATCH]

---
 shakti/m_class/ULPI.mdwn | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/shakti/m_class/ULPI.mdwn b/shakti/m_class/ULPI.mdwn
index c31bb71f6..483cfc687 100644
--- a/shakti/m_class/ULPI.mdwn
+++ b/shakti/m_class/ULPI.mdwn
@@ -8,6 +8,18 @@
 ## LICENSE
 BSD I guess...(fix me)
 
+## Useful resources
+
+![UTMI_interface](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_bb.JPG)
+
+![UTMI+levels](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_aa.JPG)
+
+![UTMI+level3_interface](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_cc.JPG)
+
+![LPI_signals](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_dd.JPG)
+
+![LPI_signals_table](https://www.crifan.com/files/pic/serial_story/other_site/p_blog_dd.JPG)
+
 ## reference
 * <https://opencores.org/project,ulpi_wrapper> (GPL'd)
 * <https://github.com/mossmann/daisho/blob/master/sw/fpga/common/usb3/usb2_ulpi.v> (BSD)
-- 
2.30.2