update slides

diff --git a/pinmux/pinmux_chennai_2018.tex b/pinmux/pinmux_chennai_2018.tex
index a5797dd97fa3354f0abf48dcc87282573fad2b5a..0c386be364be853f988c65c7fe38800d8d716b4e 100644 (file)
--- a/pinmux/pinmux_chennai_2018.tex
+++ b/pinmux/pinmux_chennai_2018.tex
@@ -38,7 +38,8 @@
    \item Pin: an I/O pad.  May be driven (input) or may drive (output).
    \item FN: term for a single-wire "function", such as UART\_TX,
             I2C\_SDA, SDMMC\_D0 etc.  may be an input, output or both
-                (bi-directional: separate wires are always allocated).
+                (bi-directional case: two wires are always allocated, one
+                 for input to the function and one for output from the function).
    \item TODO\vspace{10pt}
   \end{itemize}
 }