conect three at24c256

[sofi_je]

hi all
sir
i made a multi pupose code lock with lcd and connect three at24c256
memory ic to at89c 52 to store the user code have any body know the circuit
of connect three at24c256 ics with at89c51 please send me
thanks
sorry for poor english

 

[sn_burki]

hi
Its very simple, you need to design a circuit in which three 24c256 will be conected with 89c52 in parallet (data pin, clock pin). 24c256 has three address pins, you have to connect those address pins to the ground (-ve) and Vcc (+ve) supply to have address (000,001,010) and while communicating with 89c256 from controller you need to send this address on data pin to select in one of these three 24c256. Here I tried to explain what you needed.

regards

 

[sn_burki]

Did you tried as suggested? if you need I will upload the schematic too,