HYB18H256321BF QIMONDA [Qimonda AG], HYB18H256321BF Datasheet - Page 34

• Manufacturer Part Number: HYB18H256321BF
• Description: 256-Mbit GDDR3 Graphics RAM GDDR3 Graphics RAM
• Manufacturer: QIMONDA [Qimonda AG]

1) DLL on mode ( -10/-11/-12/-14
2) DLL on mode ( -10/-11/-12/-14
3)
4) This value of tMRD applies only to the case where the “DLL reset” bit is not activated
5)
6)
7)
Rev. 0.80, 2007-09
09132007-07EM-7OYI
Parameter
Data-in and Data Mask to WDQS Setup
Time
Data-in and Data Mask to WDQS Hold
Time
Data-in and DM input pulse width (each
input)
DQS input low pulse width
DQS input high pulse width
DQS Write Preamble Time
DQS Write Postamble Time
Write Recovery Time
Read Cycle Timing Parameters for Data and Data Strobe
Data Access Time from Clock
Read Preamble
Read Postamble
Data-out high impedance time from CLK
Data-out low impedance time from CLK
DQS edge to Clock edge skew
DQS edge to output data edge skew
Data hold skew factor
Data output hold time from DQS
Refresh/Power Down Timing
Refresh Period (8192 cycles)
Average periodic Auto Refresh interval
Delay from AREF to next ACT/ AREF
Self Refresh Exit time
Power Down Exit time
Other Timing Parameters
RES to CKE setup timing
RES to CKE hold timing
Termination update Keep Out timing
Rev. ID EMRS to DQ on timing
Rev. ID EMRS to DQ off timing
t
t
t
t
HP
MRD
RASmax
RCDWR(Min)
is the lesser of
is defined from MRS to any other command then READ
is 8*
may not drop below 2 ×
t
REF
t
CL
CAS latency
minimum and
f
f
CK(Min
CK(Min
t
CK
t
CH
)= 400 MHz)
)= 400 MHz)
minimum actually applied to the device CLK, CLK inputs
Symbol Limit Values
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
DS
DH
DIPW
DQSL
DQSH
WPRE
WPST
WR
AC
RPRE
RPST
HZ
LZ
DQSCK
DQSQ
QHS
QH
REF
REFI
RFC
XSC
XPN
ATS
ATH
KO
RIDon
RIDoff
–10
Min.
0.14
0.14
0.40
0.40
0.40
0.75
0.75
13
-0.21 0.21
0.75
0.75
t
t
-0.21 0.21
—
—
t
—
3.9
52.0
1000 —
7
10
10
10
—
—
ACmin
ACmin
HP
–
t
QHS
Max.
—
—
—
—
—
1.25
1.25
—
1.25
1.25
t
t
0.120 —
0.120 —
32
—
—
—
—
—
20
20
ACmax
ACmax
34
–11
Min.
0.15
0.15
0.40
0.40
0.40
0.75
0.75
13
-0.22 0.22
0.75
0.75
t
t
-0.22 0.22
—
3.9
52.0
1000 —
7
10
10
10
—
—
ACmin
ACmin
Max.
—
—
—
—
—
1.25
1.25
—
1.25
1.25
t
t
0.130 —
0.130 —
32
—
—
—
—
—
20
20
ACmax
ACmax
–12
Min.
0.16
0.16
0.40
0.40
0.40
0.75
0.75
12
-0.22 0.22
0.75
0.75
t
t
-0.22 0.22
—
3.9
52.0
1000 —
7
10
10
10
—
—
ACmin
ACmin
Max.
—
—
—
—
—
1.25
1.25
—
1.25
1.25
t
t
0.140 —
0.140 —
32
—
—
—
—
—
20
20
ACmax
ACmax
–14
Min.
0.18
0.18
0.40
0.40
0.40
0.75
0.75
10
–0.25 0.25
0.75
0.75
t
t
–0.25 0.25
—
3.9
52.0
1000
6
10
10
10
—
—
ACmin
ACmin
Internet Data Sheet
HYB18H256321BF
Max.
—
—
—
—
—
1.25
1.25
—
1.25
1.25
t
t
0.160 ns
0.160 ns
32
—
—
—
—
—
—
20
20
ACmax
ACmax
256-Mbit GDDR3
Unit Note
ns
ns
t
t
t
t
t
t
ns
t
t
ns
ns
ns
ns
ms
μs
ns
t
t
ns
ns
ns
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
CK
8)
11)