1. What addressing modes are used to access the lower 128 bytes of on-chip RAM? What addressing modes are used to access the upper 128 bytes of on-chip RAM? What addressing modes are used to access SFRs?
Answer: To access the lower 128 bytes of on-chip RAM, use direct addressing, register indirect addressing, and bit addressing; to access the upper 128 bytes of on-chip RAM, use register indirect addressing; to access SFR, use direct addressing and bit addressing.
2. What addressing mode is used to access off-chip RAM?
Answer: Accessing off-chip RAM uses register indirect addressing
3. What addressing mode is used to access program memory? What addressing mode is used for instruction jump?
Answer: To access the program memory, use the instruction absolute addressing and instruction relative addressing. To jump to an instruction, use the instruction absolute addressing and instruction relative addressing.
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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