题目内容

Memory address register holds the address of the next instruction to be executed.

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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. ( )

Apart from CMOS technology, most microcontrollers offer power management modes like sleep mode or idle mode. ( )