diff --git a/tcl/board/ek-lm3s1968.cfg b/tcl/board/ek-lm3s1968.cfg
index 28066f3f9..cb83a3aa9 100644
--- a/tcl/board/ek-lm3s1968.cfg
+++ b/tcl/board/ek-lm3s1968.cfg
@@ -8,6 +8,8 @@
 # source [find interface/jlink.cfg]
 
 # include the FT2232 interface config for on-board JTAG interface
+# NOTE:  using the on-board FT2232 JTAG/SWD/SWO interface is optional!
+# so is using in JTAG mode, as done here.
 source [find interface/luminary.cfg]
 
 # include the target config
diff --git a/tcl/board/ek-lm3s9b9x.cfg b/tcl/board/ek-lm3s9b9x.cfg
index fb6272afd..099e40d52 100644
--- a/tcl/board/ek-lm3s9b9x.cfg
+++ b/tcl/board/ek-lm3s9b9x.cfg
@@ -5,6 +5,8 @@
 # http://www.luminarymicro.com/products/ek-lm3s9b92.html
 #
 
+# NOTE:  using the bundled FT2232 JTAG/SWD/SWO interface is optional!
+# so is using in JTAG mode, as done here.
 source [find interface/luminary-icdi.cfg]
 source [find target/lm3s9b9x.cfg]