MCF8316A: IPD Current Waveform

Hi expert,

I'm confused about figure 8-4. Why is the IPD phase current value increases first in high di/dt and decrease in low di/dt ramp? Shouldn't it increase in ramp first and decay to 0 quickly? As is showed in figure 7-22?

Another question I would like to confirm is that, is the winding R measured during the rising edge in figure 8-4 and L measured during the ramp down using equation 'u=Ldi/dt'?

Many thanks!