指令MOV 05, R7中源操作数的寻址方式为()
A. 立即数寻址
B. 直接寻址
C. 寄存器寻址
D. 寄存器间接寻址
E. 变址寻址
查看答案
Memory address register holds the address of the next instruction to be executed.
Harvard architecture has()
A. separate data and program memory
B. unified cache memory
C. multiple functional units
D. an on-chip cache
() register holds the contents of data or instruction read from or written into the memory.
A. PC
B. IR
C. MAR
D. MBR
Most of the present microcontrollers offer the feature of locking its on-chip program memory so that reading it from external circuit is not possible. ( )