malli_1729
Full Member level 5
Hi!
Iam new to microcontrollers...........
It is a simple question...........
but i didn't understand so ,iam asking...
please help................
In AT89s51 they will give in specifications 128 bytes of onchip ram.
but we are using 8-bit registers to access them so, we can address 256 bytes of memory.lower 128 bytes are addressed by direct and indirect addressing.,because there are memory locations which are existing there.and upper 128 bytes ae addressed by using indirect addressing.............
my doubt is: Actually those locations we are saying 0x80h-0xffh are not existing on the chip then how we can store data in them and how we can access them........
this is right or wrong i don't know.............
please clear m doubt...............
Iam new to microcontrollers...........
It is a simple question...........
but i didn't understand so ,iam asking...
please help................
In AT89s51 they will give in specifications 128 bytes of onchip ram.
but we are using 8-bit registers to access them so, we can address 256 bytes of memory.lower 128 bytes are addressed by direct and indirect addressing.,because there are memory locations which are existing there.and upper 128 bytes ae addressed by using indirect addressing.............
my doubt is: Actually those locations we are saying 0x80h-0xffh are not existing on the chip then how we can store data in them and how we can access them........
this is right or wrong i don't know.............
please clear m doubt...............