hy5ps1g831lf Hynix Semiconductor, hy5ps1g831lf Datasheet - Page 32

• Manufacturer Part Number: hy5ps1g831lf
• Description: 1gb Ddr2 Sdram
• Manufacturer: Hynix Semiconductor

Rev. 1.2 / Dec 2006
ure shows a method to calculate these points when the device is no longer driving (tRPST), or begins driv-
ing (tRPRE) by measuring the signal at two different voltages. The actual voltage measurement points are
not critical as long as the calculation is consistent.
20. Input waveform timing with differential data strobe enabled MR[bit10] =0, is referenced from the input
signal crossing at the V
input signal crossing at the V
to the device under test.
21. Input waveform timing with differential data strobe enabled MR[bit10]=0, is referenced from the input
signal crossing at the V
the differential data strobe crosspoint for a falling signal applied to the device under test.
22. Input waveform timing is referenced from the input signal crossing at the V
and V
23. Input waveform timing is referenced from the input signal crossing at the V
and V
tRPST end point
tHZ , tRPST end point = 2*T1-T2
IL
IH
(ac) for a falling signal applied to the device under test.
(dc) for a falling signal applied to the device under test.
tHZ
DQS
DQS
IH
IH
(ac) level to the differential data strobe crosspoint for a rising signal, and from the
(dc) level to the differential data strobe crosspoint for a rising signal and V
IL
(ac) level to the differential data strobe crosspoint for a falling signal applied
Differential Input waveform timing
VOH + xmV
VOL + 1xmV
VOL + 2xmV
VOH + 2xmV
tDS
tDH
tDS
VTT + 2xmV
VTT - 2xmV
tLZ , tRPRE begin point = 2*T1-T2
VTT + xmV
VTT -xmV
tDH
V
V
V
V
V
V
V
IH
IL
IH(ac)
IH(dc)
IL(ac)
DDQ
REF
IL(dc)
SS
(dc) level for a rising signal
(ac) level for a rising signal
(dc)
1HY5PS1G431(L)F
1HY5PS1G831(L)F
max
max
min
min
tHZ
tRPRE begin point
IL
(dc) to
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