Rev. 1.4 / July 2006

33

HY5PS12821(L)F

HY5PS121621(L)F

these points when the device is no longer driving (tRPST), or begins driving (tRPRE) by measuring the signal at two

20. Input waveform timing with differential data strobe enabled MR[bit10] =0, is referenced from the input signal cross-

21. Input waveform timing with differential data strobe enabled MR[bit10]=0, is referenced from the input signal cross-

strobe crosspoint for a falling signal applied to the device under test.

for a falling signal applied to the device under test.

for a falling signal applied to the device under test.

tHZ , tRPST end point = 2*T1-T2

tLZ , tRPRE begin point = 2*T1-T2

VOH + xmV

VOH + 2xmV

VOL + 1xmV

VOL + 2xmV

tHZ

tRPST end point

VTT + 2xmV

VTT + xmV

VTT -xmV

VTT - 2xmV

tHZ

tRPRE begin point

DQS

tDH

tDS

DQS

tDH

tDS

Differential Input waveform timing