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I want to interface RF transmitter and receiver with 80v51 uc. which is the best suited trasmitter and receiver ic for 89v51 uc ? and is der any way to trasnmit data by encryptying it ? i need help . . thank u .
i want to use 450 MHz or 900 MHz frequency.
Sorry. I'm know nothing of these modules. Go to the module data sheets to determine the interface signals. Go to the 80V51 data sheets to see if the device supports the type of interface the modules require.
I don't know what country you are located but I suggest that you become well aware of the laws of RF in your country. Frequency bands allowed in one country may be forbidden in another country.
Most of the newer RF transceiver will support what is called Hi Band or Lo Band. For example the TI CC1100 transceiver will tune via internal registers from 380MHz to 960MHz. Your band restriction then would be the antenna design.
As I read over your email I now realize that you might be looking for a complete RF module already wired and ready to go. Look at Xbee modules for a completed RF module design. Also you can download schematics of their modules to see if they fit your application.
Again, I suggest that you vist the website of the device vendors such as Silabs or TI even though you may not use their devices. They have a lot of information and tutorials on these web sites.
Bradford
thank you for helping me