TABLe 10.2
Router Areas
Router Type
Area (μm 2 )
Four-port
80,305.5
Five-port
190,930
Six-port
259,761
TABLe 10.1
Parameters for Orion
Parameter
Value
Technology
90 nm
Operating condition (transistor type)
NVT (normal)
Supply voltage
1.0 V
Frequency
1.5 GHz
Virtual channels
4
Input buffer
1 (present)
Input buffer depth
6
Buffer type
Register
NVT, nominal threshold voltage (V t )
295
Reconfigurable Network-on-Chip Design
TABLe 10.3
Area for Other Module Types
Module Type
Area (μm 2 )
4:1 Multiplexer
3237
2:1 Multiplexer
1618.5
Eight-input two-output selection logic
809.25
Four-input two-output selection logic
404.62
in Table 10.1. The router area values are noted in Table 10.2. Different types
of multiplexers (4:1 and 2:1) and selection logic modules (eight-input twooutput and four-input two-output) have been synthesized using Synopsys
Design Vision tool with 90-nm library. The corresponding area values are
noted in Table 10.3.
For an M × N NoC assuming two cores per router (i.e., a total of 2MN cores)
and each core being of area x μm 2 , the overhead of the proposed approach
is given by the ratio of the total network area to the total core area. The total
network area overhead is given by: