The MCP23017 16 pin I/O expander does not work properly. I have followed the datasheet and the instructions in the example code on Github, but the chip does not do anything except turn on like 3 pins HIGH, and only one should be HIGH. This is weird. Can not even bring it to LOW. All connections are fine, I have orientated the chip so I can read the label on it. According to the datasheet, I have done everything right (I hope).
Please Please please help, this is urgent.
Thanks a lot
MCP23017 Not Working
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- rahatmaini
- Posts: 176
- Joined: Wed Aug 29, 2012 5:15 pm
Re: MCP23017 Not Working
False Alarm, had it plugged in the wrong way. I am stupid.
Does this mean that now the chip is useless? I had it flipped the way it is normally supposed to be, with that semicircle indent on the bottom not the top. Do I need to buy another one now or will this still work (I havent had time to try it yet)?
Does this mean that now the chip is useless? I had it flipped the way it is normally supposed to be, with that semicircle indent on the bottom not the top. Do I need to buy another one now or will this still work (I havent had time to try it yet)?
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: MCP23017 Not Working
Plugging in in backwards should not have damaged it. But there's only one way to know for sure!
Please be positive and constructive with your questions and comments.