Hi I want to connect many devices like Serial EEPROM, ADC,DAC,RTC and many other I/O devices to 8051.
My question is how address mapping can be done ? How to address them??
Please reply i am in need.
"How to address them??"
That bit is simple - you just use MOVX or MOVC, as approprate. These cause the appropriate address to be presented on the address bus.
Is your question really how to decode the addresses, so that each peripheral "knows" when it is being addressed? If so, the principle is exactly the same as for any other bus-based system.
You need to start by uderstanding how the 8051 external address/data bus works - see the so-called "bible" for the 8051:
Chapter 1 - 80C51 Family Architecture: www.nxp.com/.../80C51_FAM_ARCH_1.pdf
Chapter 2 - 80C51 Family Programmer's Guide and Instruction Set: www.nxp.com/.../80C51_FAM_PROG_GUIDE_1.pdf
Chapter 3 - 80C51 Family Hardware Description: www.nxp.com/.../80C51_FAM_HARDWARE_1.pdf
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