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README.md

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@@ -11,14 +11,22 @@ In case you like this library it would be cool if you give it a star.
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If you find bugs, please inform me!
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<b>Important notice</b>:
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In 2022 Microchip has unfortunately updated the design of the MCP23017. <b>GPA7 and GPB7 have lost their input function</b>:</BR>
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In 2022 Microchip has changed the data sheet of the MCP23017. <b>GPA7 and GPB7 have lost their input function</b>:</BR>
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![new_design_mcp23017](https://user-images.githubusercontent.com/41305162/232289151-890811c7-b6f1-40a1-af07-35e38afbcfbe.png) </BR>
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You can only use these pins as output. There is no change to the MCP23S17, MCP23018 and MCP23S18.
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According to the data sheet you should only use these pins as output. It appears that Microchip has responded to issues encountered in practice. I, personally, have not exerienced any issue with the input function of GPA7 or GPB7.
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You find this information in latest datasheet:
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https://www.microchip.com/en-us/product/mcp23017
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And here you find a statement from Microchip regarding the use of the GPA7/B7 as input pins:
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https://microchip.my.site.com/s/article/GPA7---GPB7-Cannot-Be-Used-as-Inputs-In-MCP23017
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There is no change to the MCP23S17, MCP23018 and MCP23S18.
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Written by Wolfgang (Wolle) Ewald
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You can find more information about my library here:
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http://wolles-elektronikkiste.de/portexpander-mcp23017 (German)
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