diff --git a/README.md b/README.md
index bf8973d9..8810fa56 100644
--- a/README.md
+++ b/README.md
@@ -583,6 +583,14 @@ Eclipse indexer.
 
 # Q7S Utilities and Troubleshooting
 
+## pa3tool Host Tool
+
+The `pa3tool` is a host tool to interface with the ProASIC3 on the Q7S board. It was
+installed on the clean room PC but it can also be found 
+[on the Traq platform](https://trac2.xiphos.ca/manual/attachment/wiki/WikiStart/libpa3-1.3.4.tar.gz).
+
+For more information, see Q7S datasheet.
+
 ## Creating files with cat and echo
 
 The only folder which can be written in the root filesystem is the `tmp` folder.