2 votes 2 votes What is the difference between control signal and control word? Also, the difference between micro-operation and microinstruction. CO and Architecture co-and-architecture microprogramming horizontal control-unit + – Injila asked Dec 29, 2017 Injila 924 views answer comment Share Follow See 1 comment See all 1 1 comment reply gauravkc commented Dec 29, 2017 reply Follow Share It's hierarchical. At the top we have an Instruction. An instruction has a micro-program that defines it's logic. A micro-program consists of micro-instructions in it. Each micro-instruction specify micro-operation(s) for that particular micro-instruction. This is theoretical interpretation. On the implementation side, a micro-instruction is a control word (Series of 0s and 1s. Each 0 or 1 specify the state of some flag or port or anything and control signal). In a control word, a part of it is control signal which actually specifies the micro-instructions to be carried out (In terms of binary string). http://nptel.ac.in/courses/Webcourse-contents/IIT-%20Guwahati/comp_org_arc/msword/m5_CPU_Design/5_Microprogrammed%20Control.doc Read this doc 3 votes 3 votes Please log in or register to add a comment.