From 2307c6bf4ab03da55eb69ec46e47023ab4c0da5b Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sun, 17 Jun 2018 13:50:19 +0100
Subject: [PATCH] add config slide

---
 pinmux/pinmux_chennai_2018.tex | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/pinmux/pinmux_chennai_2018.tex b/pinmux/pinmux_chennai_2018.tex
index ee78845d8..5d0b4806e 100644
--- a/pinmux/pinmux_chennai_2018.tex
+++ b/pinmux/pinmux_chennai_2018.tex
@@ -125,6 +125,26 @@
 }
 
 
+\frame{\frametitle{Pin Configuration, input and output}
+
+ In/out:
+ \begin{itemize}
+   \item Output-Enable (aka Input disable): switches pad to In or Out
+   \item Output (actually an input wire controlling pin's level, HI/LO)
+   \item Input (actually an output wire set based on pin's driven level)
+ \end{itemize}
+ Characteristics:
+ \begin{itemize}
+   \item Output current level: 10mA / 20mA / 30mA / 40mA
+   \item Input hysteresis: low / middle / high. Stops signal noise
+   \item Pin characteristics: CMOS Push-Push / Open-Drain
+   \item Pull-up enable: built-in 10k (50k?) resistor
+   \item Pull-down enable: built-in 10k (50k?) resistor
+   \item Muxing and IRQ Edge-detection not part of the I/O pin
+  \end{itemize}
+}
+
+
 \frame{\frametitle{Standard GPIO 4-way in/out Mux and I/O pad}
  \begin{center}
   \includegraphics[height=2.5in]{../shakti/m_class/mygpiomux.jpg}\\
-- 
2.30.2