K4B1G0446D Datasheet, PDF (44/60 Pages) Samsung semiconductor – 1Gb D-die DDR3 SDRAM Specification

K4B1G04(08/16)46D
[ Table 46 ] DDR3-1600 Speed Bins
Speed
CL-nRCD-nRP
Parameter
Intermal read command to first data
ACT to internal read or write delay time
PRE command period
ACT to ACT or REF command period
ACT to PRE command period
CWL = 5
CL = 6
CWL = 6
CWL = 7, 8
CWL = 5
CL = 7
CWL = 6
CWL = 7
CWL = 8
CWL = 5
CL = 8
CWL = 6
CWL = 7
CWL = 8
CWL = 5,6
CL = 9
CWL = 7
CWL = 8
CWL = 5,6
CL = 10
CWL = 7
CWL = 8
CWL = 5,6,7
CL = 11
CWL = 8
Supported CL Settings
Supported CWL Settings
Symbol
tAA
tRCD
tRP
tRC
tRAS
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
1Gb DDR3 SDRAM
min
TBD
TBD
TBD
TBD
35
DDR3-1600
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
max
20
-
-
-
9*tREFI
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
nCK
nCK
Note
13.3.1 Speed Bin Table Notes
Absolute Specification (T_OPER; V_DDQ = V_DD = 1.5V +/- 0.075 V);
Note :
1. The CL setting and CWL setting result in tCK(AVG).MIN and tCK(AVG).MAX requirements. When making a selection of tCK(AVG), both need to be ful-
filled: Requirements from CL setting as well as requirements from CWL setting.
2. tCK(AVG).MIN limits: Since CAS Latency is not purely analog - data and strobe output are synchronized by the DLL - all possible intermediate frequen-
cies may not be guaranteed. An application should use the next smaller JEDEC standard tCK(AVG) value (2.5, 1.875, 1.5, or 1.25 ns) when calculating
CL [nCK] = tAA [ns] / tCK(AVG) [ns], rounding up to the next "SupportedCL".
3. tCK(AVG).MAX limits: Calculate tCK(AVG) = tAA.MAX / CL SELECTED and round the resulting tCK(AVG) down to the next valid speed bin (i.e. 3.3ns
or 2.5ns or 1.875 ns or 1.25 ns). This result is tCK(AVG).MAX corresponding to CL SELECTED.
4. "Reserved" settings are not allowed. User must program a different value.
5. "Optional" settings allow certain devices in the industry to support this setting, however, it is not a mandatory feature. Refer to supplier’s data sheet and/
or the DIMM SPD information if and how this setting is supported.
6. Any DDR3-1066 speed bin also supports functional operation at lower frequencies as shown in the table which are not subject to Production Tests but
verified by Design/Characterization.
7. Any DDR3-1333 speed bin also supports functional operation at lower frequencies as shown in the table which are not subject to Production Tests but
verified by Design/Characterization.
8. Any DDR3-1600 speed bin also supports functional operation at lower frequencies as shown in the table which are not subject to Production Tests but
verified by Design/Characterization.
Page 44 of 60
Rev. 1.1 August 2008