Table 54: DDR3-1600 Speed Bins
DDR3-1600 Speed Bin
Units
Notes
CL-tRCD-tRP
11-11-11
Parameter
Symbol
Min
Max
ACTIVATE to internal READ or WRITE
delay time
tRCD
13.75
–
ns
PRECHARGE command period
tRP
13.75
–
ns
ACTIVATE-to-ACTIVATE or REFRESH
command period
tRC
48.75
–
ns
ACTIVATE-to-PRECHARGE command
period
tRAS
35
9 x tREFI
ns
CL = 5
CWL = 5
tCK (AVG)
3.0
3.3
ns
CWL = 6, 7, 8
tCK (AVG)
Reserved
ns
CL = 6
CWL = 5
tCK (AVG)
2.5
3.3
ns
CWL = 6
tCK (AVG)
Reserved
ns
CWL = 7, 8
tCK (AVG)
Reserved
ns
CL = 7
CWL = 5
tCK (AVG)
Reserved
ns
CWL = 6
tCK (AVG)
1.875
<2.5
ns
CWL = 7
tCK (AVG)
Reserved
ns
CWL = 8
tCK (AVG)
Reserved
ns
CL = 8
CWL = 5
tCK (AVG)
Reserved
ns
CWL = 6
tCK (AVG)
1.875
<2.5
ns
CWL = 7
tCK (AVG)
Reserved
ns
CWL = 8
tCK (AVG)
Reserved
ns
CL = 9
CWL = 5, 6
tCK (AVG)
Reserved
ns
CWL = 7
tCK (AVG)
1.5
<1.875
ns
CWL = 8
tCK (AVG)
Reserved
ns
CL = 10
CWL = 5, 6
tCK (AVG)
Reserved
ns
CWL = 7
tCK (AVG)
1.5
<1.875
ns
CWL = 8
tCK (AVG)
Reserved
ns
CL = 11
CWL = 5, 6, 7
tCK (AVG)
Reserved
ns
CWL = 8
tCK (AVG)
1.25
<1.5
ns
Supported CL settings
5, 6, 7, 8, 9, 10, 11
CK
Supported CWL settings
5, 6, 7, 8
CK
Notes: 1. The -125 speed grade is backward compatible with 1333, CL = 9 (-15E) and 1066, CL = 7
(-187E).
2. tREFI depends on TOPER.
3. The CL and CWL settings result in tCK requirements. When making a selection of tCK,
both CL and CWL requirement settings need to be fulfilled.
4. Reserved settings are not allowed.
2Gb: x4, x8, x16 DDR3 SDRAM
Speed Bin Tables
PDF: 09005aef826aaadc
2Gb_DDR3_SDRAM.pdf – Rev. K 04/10 EN
76
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