DDR4-2666 Speed Bins and Operations
Speed Bin
DDR4-2666V
CL-nRCD-nRP
19-19-19
min
Unit
NOTE
Parameter
Symbol
max
14.2514
Internal read command to
first data
tAA
18.00
ns
ns
12
12
(13.75)5,12
Internal read command to
first data with read DBI
enabled
tAA_DBI
tAA(min) + 3nCK
tAA(max) + 3nCK
ACT to internal read or write
delay time
14.25
tRCD
tRP
-
ns
ns
ns
ns
12
12
12
12
(13.75)5,12
PRE command period
14.25
(13.75)5,12
-
ACT to PRE command
period
tRAS
tRC
32
9 x tREFI
-
ACT to ACT or REF com-
46.25
(45.75)5,12
mand period
Normal Read DBI
CWL = CL = 9 CL = 11 tCK(AVG)
Reserved
Reserved
ns 1,2,3,4,11
9
CL = 10 CL = 12 tCK(AVG)
1.5
1.6
ns
ns
1,2,3,11
4
CWL = CL = 10 CL = 12 tCK(AVG)
9,11
CL = 11 CL = 13 tCK(AVG)
CL = 12 CL = 14 tCK(AVG)
1.25
1.25
<1.5
<1.5
ns
1,2,3,4,9
1,2,3,9
4
ns
CWL = CL = 12 CL = 14 tCK(AVG)
10,12
Reserved
Reserved
ns
CL = 13 CL = 15 tCK(AVG)
CL = 14 CL = 16 tCK(AVG)
1.071
1.071
<1.25
<1.25
ns
1,2,3,4,9
1,2,3,9
4
ns
CWL = CL = 14 CL = 17 tCK(AVG)
ns
11,14
CL = 15 CL = 18 tCK(AVG)
CL = 16 CL = 19 tCK(AVG)
0.937
0.937
<1.071
<1.071
ns
1,2,3,4,9
1,2,3,9
4
ns
CWL = CL = 15 CL = 18 tCK(AVG)
12.16
Reserved
Reserved
ns
CL = 16 CL = 19 tCK(AVG)
CL = 17 CL = 20 tCK(AVG)
CL = 18 CL = 21 tCK(AVG)
ns
1,2,3,4,9
1,2,3,4,9
1,2,3
0.833
0.833
<0.937
<0.937
ns
ns
CWL = CL = 17 CL = 20 tCK(AVG)
Reserved
Reserved
ns
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3
14,18
CL = 18 CL = 21 tCK(AVG)
CL = 19 CL = 22 tCK(AVG)
CL = 20 CL = 23 tCK(AVG)
Supported CL Settings
ns
0.75
0.75
<0.833
<0.833
ns
ns
10,(11),12,(13),14,(15),16,(17),18,19,20
12,(13),14,(15),17,(18),19,(20),21,22,23
9,10,11,12,14,16,18
nCK
nCK
nCK
13
Supported CL Settings with read DBI
Supported CWL Settings
Rev. 1.0 / Oct.2020
38