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1. Re: interfacing keypad to psoc1
srinath.vardae Feb 16, 2012 4:20 AM (in response to srinath.vardae)My only problem is I cannot able to make a key's coloumn low and row high at the same time. Help me with the driving mode for the coloumn and row of the keys
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2. Re: interfacing keypad to psoc1
user_1377889 Feb 16, 2012 7:29 AM (in response to srinath.vardae)I would suggest not to use external resistors (if that is possible), otherwise you have a voltage divider between the internal pullup resistor and the external. This will result in a voltage that is neither High nor Low.
Bob
PS: I've posted some time ago a solution for a 3x4 matrix keyboard for PSoC3 and PSoC5. Just for your understanding have a look at it (with PSoC Creator 2.0) Search for "matrix" here or in the PSoCDeveloper forum.