Regarding f28069 memory map

tamil vanan said:

i have read in datasheet that f28069 has 32 bit data address and 22 bit program address.

Tamil,

This is the reach of the bus itself.  The data bus has 22 bits of reach and the program address bus has 22-bits of reach.  All of our current devices only use up to 22-bits (ie addresses 0x000000 - 0x3F7FFF).

tamil vanan said:

But i can see in memory mapping that 16 bit(MSB) is mapped as data space and 16 bit (LSB) is mapped as program space

Yes - each address points to 16bits of data.  Note, C28x has unified memory - so the data the program bus sees is the same as what the data bus sees.

tamil vanan said:

please clarify me ,suppose if i want to connect  external memory how do i connect it

Well - this depends on which peripheral you are going to connect the external memory.  The 28069 doesn't have an XINTF (external interface), but you could connect EEPROM to the SPI.  This becomes more a peripheral question than a CPU question.

Regards

Lori