Register Transfer Language

1
??????????????????????Register Transfer Language

• ?????????? ??????????
• ??????????????????????????
• ??????????????????????

2
Implementation of ?OP X?Y
Direct connection
Bus Connection
3
Implementation of ?OP X?Y
Direct connection
Bus Connection
4
Implementation of ?OP X?Ywith control signal
Direct connection
Bus Connection
5
Implementation of data transfer (1)

• ? X?Y, Y?Z

• ? X?Y, Z?Y

6
Implementation of data transfer (2) ? X?0 and
?X ? 1
Using MUX
Using ? as data input
Using CLR signal
7
Arithmetic and ?OP

• Arithmetic
• Add
• X?XY
• Subtract
• X?X-Y
• Increment
• X?X1
• Decrement
• X?X-1
• AND
• X?X?Y
• OR
• X?X?Y

8
D Flip-flop
W/ clear input
W/O clear input
9
Data paths of the system to implement the RTL
code using direct connections
10
Complete design
11
Complete design (using 3-state buffers)
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Complete design (using mux and bus)
13
State diagram for the modulo 6 counter
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Modulo 6 counter (using a register)
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Modulo 6 counter (using a counter)
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Toll booth controller