Internet Data Sheet
HY[B/I]18T1G[40/80/16]0C2[C/F](L)
1-Gbit Double-Data-Rate-Two SDRAM
Parameter
Symbol
DDR2–1066
Min.
Unit
Note1)2)3)4)5)
6)7)
Max.
Mode register set command cycle time
OCD drive mode output delay
DQ/DQS output hold time from DQS
DQ hold skew factor
tMRD
tOIT
2
0
—
nCK
ns
34)
12
25)
tQH
tHP – tQHS
—
ps
26)
tQHS
tREFI
—
250
7.8
3.9
—
ps
27)28)
27)29)
30)
Average periodic refresh Interval
—
μs
—
μs
Auto-Refresh to Active/Auto-Refresh command tRFC
127.5
ns
period
31)32)
31)33)
34)
Read preamble
Read postamble
tRPRE
tRPST
0.9
0.4
7.5
1.1
0.6
—
tCK.AVG
tCK.AVG
ns
Active to active command period for 1KB page tRRD
size products
34)
34)
Active to active command period for 2KB page tRRD
size products
10
—
ns
Internal Read to Precharge command delay
Write preamble
tRTP
7.5
—
—
0.6
—
—
—
—
ns
tWPRE
tWPST
tWR
0.35
0.4
tCK.AVG
tCK.AVG
ns
Write postamble
34)
Write recovery time
15
34)35)
Internal write to read command delay
Exit active power down to read command
tWTR
tXARD
7.5
ns
3
nCK
nCK
Exit active power-down mode to read command tXARDS
10 – AL
(slow exit, lower power)
Exit precharge power-down to any command
Exit self-refresh to a non-read command
Exit self-refresh to read command
tXP
3
—
—
—
nCK
ns
34)
tXSNR
tXSRD
tRFC +10
200
nCK
nCK
Write command to DQS associated clock edges WL
RL – 1
Rev. 1.60, 2008-08
43
09262007-3YK7-BKKG
QIMONDA [ QIMONDA AG ]
