Suggested fix for rwaldron#1009. Corrected sketches for expander MCP2…

…3017. Added note to README about address pins with link to data sheet.
jcanaves · Jan 13, 2016 · a415c13 · a415c13
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diff --git a/docs/breadboard/expander-MCP23017-basic.fzz b/docs/breadboard/expander-MCP23017-basic.fzz
diff --git a/docs/breadboard/expander-MCP23017-basic.png b/docs/breadboard/expander-MCP23017-basic.png
diff --git a/docs/breadboard/expander-MCP23017.fzz b/docs/breadboard/expander-MCP23017.fzz
diff --git a/docs/breadboard/expander-MCP23017.png b/docs/breadboard/expander-MCP23017.png
diff --git a/docs/expander-MCP23017.md b/docs/expander-MCP23017.md
@@ -21,7 +21,11 @@ Fritzing diagram: [docs/breadboard/expander-MCP23017.fzz](breadboard/expander-MC
 
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+**Note:** MCP23017 has three pins (15-17) to set the I2C hardware address. By default, these 
+pins must be connected to ground for the default address 0x20. If you have another 
+I2C device connected with that address or you're planning to use multiple MCP23017s 
+see page eight of the
+[data sheet](http://ww1.microchip.com/downloads/en/DeviceDoc/21952b.pdf).
 
 
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