Question

How many instructions pipelining is used in ARM7EJ-S?

(a) 3-Stage

(b) 4-Stage

(c) 5-Stage

(d) 2-stage

The question was posed to me during a job interview.

I want to ask this question from Microcontroller (ARM 7) topic in section Prototyping Embedded Devices of IOT

Answer 1

Correct option is (c) 5-Stage

The explanation is: A five-stage pipelining is used, consisting of Fetch, Decode, Execute, Memory, and Writeback stages. A six-stage pipelining is used in Jazelle state, consisting of Fetch, Jazelle, Execute, Memory, and Writeback stages.