The use of custom SRAM in place of synthesizable flip flops in the input block has resulted in a saving of over 26% of the silicon area and power optimization is 65% when operated at 16 ns clock. The other two components of the routing node take up negligible area in comparison. ![]() Of the four components of routing node, the input block (mainly consisting of buffers) and scheduler have been modified to save area requirements. Resource sharing for on-chip network is critical to reduce the chip area and power consumption.An area efficient implementation of a routing node for a NoC is presented. Power consumption, area overhead and the entire NoC performance is influenced by the router buffers. Small optimizations in NoC router architecture can show a significant improvement in the overall performance of NoC based systems. Network-on-Chip (NoC) is the interconnection platform that answers the requirements of the modern on-Chip design. Post layout simulation showed that the new circuit provides the same functional performances as conventional solutions with significantly less power consumption, area and digital noise. The different flip-flops were implemented in STMicroelectronics 65 nm process technology and simulated for the worst case condition where the switching activity is maximal. To evaluate its performance, an octal flip-flop was built according to the new proposed structure and compared to the main octal flip-flops used today. A new n-fold flip-flop exploiting the clock gating technique for both outputs enabling and power saving is presented. In this paper we delve into the design of n-fold flip-flops with output enable. This can be done easily by changing the between the 3 states, so only the units that are needed will be connected to the bus at any time.With the evolution of the semiconductor industry and the continuous growing demands for high performance VLSI circuit, the aggressive scaling in feature size and high integration density along with the high operating frequencies make power consumption and digital noise in modern analog and digital devices one of the top concerns of Very Large Scale Integration (VLSI) circuit design. Imagine, with the above diagram, you receive an input to access a memory address, which then needs to be sent to a register, then go through the ALU, and finally the data is sent to the output. In this way, data can be sent back and forth and only the units that require the information will receive it. With Tri-state logic, each individual unit can either read from the bus, write to the bus or just be disconnected. You also dont want them writing to the bus at the same time. ![]() You don't want the information on the bus to be read by every unit at the same time. ![]() With tri-state logic, components can either read from the bus, write to the bus, or be essentially disconnected so that it does not affect the bus, and will not be affected by the state of the bus either.Īs an example of using tri-state logic is on a computer bus:Īs you can see, multiple units are sharing the same busses. This is very useful in circuits that have a common bus for multiple components. The third state is not floating, it is in a high impedance state, which is essentially disconnecting it from the circuit. ![]() Instead of calling it ON and OFF, think of it as IN and OUT instead. Tri-state is essentially 3 different states as you have seen.
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