On-Chip Communication Architectures

150 CHAPTER 5 Models for Power and Thermal Estimation

and ground. The capacitance between non-adjacent lines is, thus, practically negligi-

ble compared to capacitance between adjacent lines, or the capacitance between

the line and the ground. An approximate bus energy model can ignore parasit-

ics between non-adjacent lines [3, 27, 30, 33] . Additionally, assuming that all the

grounded capacitors have the same value (except for the boundary ones due to

fringing effects) and that all interline capacitances are also the same, the approxi-

mate DSM bus model becomes that shown in Fig. 5.6 and the value of the approxi-

mate total capacitance conductance ...