Briefly describe the function of a decoder. You may use a 2 to 4 decoder to explain the unctionality. What are some situations in which a decoder is used in a digital circuit?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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b) Briefly describe the function of a decoder. You may use a 2 to 4 decoder to explain the
functionality. What are some situations in which a decoder is used in a digital circuit?
Transcribed Image Text:b) Briefly describe the function of a decoder. You may use a 2 to 4 decoder to explain the functionality. What are some situations in which a decoder is used in a digital circuit?
ADD1
Add
ADD2
ALU
Presult
Add
Shift
left 2
RegDst
Branch
MemRead
Instruction [31-26]
MemtoReg
Control
ALUOP
MemWrite
ALUSrc
RegWrite
Instruction [25-21]
Read
address
Read
register 1 Read
PC
Instruction [20-16]
data 1
Read
register 2
Write
register data 2
Write
data Registers
Zero
Instruction
(31-0]
Instruction instruction [15–11]
ALU ALU
Read
result
Address Read
data
memory
Data
Write
data memory
Instruction [15-0]
16
Sign-
extend
32
ALU
control
Instruction [5-0]
Transcribed Image Text:ADD1 Add ADD2 ALU Presult Add Shift left 2 RegDst Branch MemRead Instruction [31-26] MemtoReg Control ALUOP MemWrite ALUSrc RegWrite Instruction [25-21] Read address Read register 1 Read PC Instruction [20-16] data 1 Read register 2 Write register data 2 Write data Registers Zero Instruction (31-0] Instruction instruction [15–11] ALU ALU Read result Address Read data memory Data Write data memory Instruction [15-0] 16 Sign- extend 32 ALU control Instruction [5-0]
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