MADE EASY TEST SERIES

Question

Consider a micro programmed control unit which support 360 instructions. Each instruction takes 10 micro operations, 14 flags are supported and 60 control signal vertical microprogrammed control is used then the size of 4 control words is ______ bytes

Answer 1

# of instruction = 360 

each instruction = 10  micro operation

so # of micro-operation/instruction =  360* 10 = 3600 

 # bit= log₂3600 = 12 bit

# bits of flag = log₂ 14 = 4 bit

# bit in control signal ( vertical ) = log₂60 = 6 bit

 size of control word = (12+4+6) = 22 bit

it take 4 control word =  (22 *4)/8 = 11 Byte