electroRF
Member
Hi,
I got this 8051 uC, which has the following 3 Physical Memories:
1. 64KB Program Flash Memory
2. 8KB SRAM
3. Memory Mapped Registers
It is said in the datasheet (page 30) that there are 4 memories which are mapped onto the above physical memories.
the 4 memories are:
1. 64KB Program Flash Memory
2. 256B Data Memory Space
3. XDATA Data Memory Space
4. SFRs
Could you please explain what does it mean that these 4 memories are mapped onto the 3 physical memories?
Also - what are memory mapped registers?
You may also refer to some link which explains it - I read Wiki's term but understand very little.
Thanks a lot.
I got this 8051 uC, which has the following 3 Physical Memories:
1. 64KB Program Flash Memory
2. 8KB SRAM
3. Memory Mapped Registers
It is said in the datasheet (page 30) that there are 4 memories which are mapped onto the above physical memories.
the 4 memories are:
1. 64KB Program Flash Memory
2. 256B Data Memory Space
3. XDATA Data Memory Space
4. SFRs
Could you please explain what does it mean that these 4 memories are mapped onto the 3 physical memories?
Also - what are memory mapped registers?
You may also refer to some link which explains it - I read Wiki's term but understand very little.
Thanks a lot.