What exactly tpd and tco ?

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narasimha_80

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tco tpd

Hello,

1. Can any body write to me what exaclty tco and tpd in flip flops ?
2. What is the relation( formula) between fmax, tsu,th,negative and positive clock
skews in FPGA ?



Best Regards,
Narasimha Naik
 

tsu tco tpd th

tpd - propagatinal delay
tco - combinational delay

to satisfy setup conditions,
Tclk >= Tsu + Tco,max + Tcq

to satisfy hold conditions,
Th > Tcq + Tco,min
 

tco tpd th

and from the above equation fmax = 1/Tclk(time period of a clk)
 

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