Question

What is the on-chip RAM space in 8051?

Answer 1

In extended 8051 variants, program memory can have a size of up to 16MB called ECODE and HCONST. Internal Data Memory: in the classic 8051, this is the on-chip RAM space with a maximum of 256 Bytes containing register banks, BIT space, direct addressable DATA space, and indirect addressable IDATA space.