3x4 key pad

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Read-Only Author arfai john Posted 29-May-2005 04:00 Toolset C51	3x4 key pad arfai john Hi, if a 3x4 keypad is connected to port 0 of 89c51. all pins on port 0 need to connect pull up resistor or not?
Read-Only Author erik malund Posted 31-May-2005 08:00 Toolset C51	RE: 3x4 key pad erik malund if a 3x4 keypad is connected to port 0 of 89c51. all pins on port 0 need to connect pull up resistor or not? no answer possible because derivative not specified method not specified Erik
Read-Only Author A.W. Neil Posted 31-May-2005 12:12 Toolset C51	RE: 3x4 key pad A.W. Neil "no answer possible" Rubbish! Two answers are possible: 1. Yes. 2. No.
Read-Only Author erik malund Posted 31-May-2005 13:20 Toolset C51	RE: 3x4 key pad erik malund OK, you win
Read-Only Author arfai john Posted 1-Jun-2005 09:26 Toolset C51	RE: 3x4 key pad arfai john i try to apply a program of 3x4 keypad that connect to port 2 of 8051 into my project using port 0. the keypad does not work. howcome?
Read-Only Author erik malund Posted 1-Jun-2005 10:24 Toolset C51	RE: 3x4 key pad erik malund show connections and code

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