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Iam connecting microcontroller 8051 with my PC COM1 port to have serial communication. To have same voltage levels between PC and 8051 i have used MAX232 but i need to know what other components like capacitors and resistor i need to connect in between controller and MAX232. i have the data sheet but information is limited. so can any one suggest capacitor value and quanity and other minor components.
i have capacitor all of 10uF but 10 Volts,but in datasheet it is indicated that some capacitor are of 10uF and 6.3 volts i think it will not effect but just asking will it effect the voltage levels conditions. since i will be using 10Uf 10 volts instead of 6.3 volts...as 6.3 volts are not avaiable any where in my region.
Ah - the voltage rating that you speak about is a limit. Thus if it specifies a 6.3volt capacitor, then a 10 volt capacitor will do the job just fine (although it may be physically slightly larger, and may cost a few percent more).
salutations, please send me documentation about Max232 and its communication with the sérial port in french if possible then in english
"please send me documentation about Max232" You need to go to the manufacturer for that: http://www.maxim-ic.com You can download the English version - I don't know if it's available in French. Try asking a local distributor?
the mistake made by several of the above posters id to refer Waquar to the data sheet, he does'nt read them. Erik
please can you send me a typical design dealing with the interficing of the 8051 cpu and the the max232 exuse me for my bad english greeting
"please can you send me a typical design dealing with the interficing of the 8051 cpu and the the max232" Just look on p17 of the MAX232 Data Sheet - the 8051 connects to the signals labelled "CMOS Inputs" and "CMOS Outputs" The Keil MCBx51 Evaluation Board uses a MAX232 - the schematic is in the MCBx51 User's Guide: http://www.keil.com/manuals/mcbx51.pdf There is example code in the downloads section of this site for doing interrupt-driven serial IO.