EDJ1108BABG, EDJ1116BABG
[DDR3-1066 Speed Bins]
Speed Bin
DDR3-1066E
6-6-6
DDR3-1066F
DDR3-1066G
8-8-8
CL-tRCD-tRP
/CAS write
Symbol
tAA
7-7-7
latency
min.
max.
min.
max.
20
min.
15
max.
Unit
ns
Notes
11.25
11.25
11.25
48.75
37.5
20
13.125
13.125
13.125
50.625
37.5
20
tRCD
tRP
15
ns
15
ns
tRC
52.50
37.5
ns
tRAS
9 × tREFI
9 × tREFI
9 × tREFI
ns
9
1, 2, 3,
4, 6
tCK (avg)@CL=5 CWL = 5
2.5
3.3
Reserved Reserved Reserved Reserved ns
CWL = 6
tCK (avg)@CL=6 CWL = 5
CWL = 6
Reserved Reserved Reserved Reserved Reserved Reserved ns
4
2.5
3.3
2.5
3.3
2.5
3.3
ns
1, 2, 3, 6
1, 2, 3, 4
4
1.875
< 2.5
Reserved Reserved Reserved Reserved ns
tCK (avg)@CL=7 CWL = 5
CWL = 6
Reserved Reserved Reserved Reserved Reserved Reserved ns
1.875 < 2.5 1.875 < 2.5 Reserved Reserved ns
Reserved Reserved Reserved Reserved Reserved Reserved ns
1, 2, 3, 4
4
tCK (avg)@CL=8 CWL = 5
CWL = 6
1.875
< 2.5
1.875
< 2.5
1.875
< 2.5
ns
1, 2, 3
Supported CL
settings
5, 6, 7, 8
6, 7, 8
6, 8
nCK
Supported CWL
settings
5, 6
5, 6
5, 6
nCK
[DDR3-800 Speed Bins]
Speed Bin
DDR3-800F
5-5-5
DDR3-800E
CL-tRCD-tRP
6-6-6
/CAS write
Symbol
latency
min.
12.5
12.5
12.5
50
max.
min.
15
max.
20
Unit
ns
ns
ns
ns
ns
ns
ns
Notes
tAA
20
tRCD
15
tRP
15
tRC
52.5
37.5
Reserved
2.5
tRAS
37.5
2.5
9 × tREFI
3.3
9 × tREFI
Reserved
3.3
9
tCK (avg)@CL=5
tCK (avg)@CL=6
Supported CL settings
Supported CWL settings
CWL = 5
CWL = 5
1, 2, 3, 4
1, 2, 3
2.5
3.3
5, 6
5
6
nCK
nCK
5
Notes: 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 fulfilled: 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 frequencies may not be guaranteed. An application should use the
next smaller JEDEC standard tCK (avg) value (2.5, 1.875, 1.5, or 1.25ns) when calculating
CL (nCK) = tAA (ns) / tCK (avg)(ns), rounding up to the next ‘Supported CL’.
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 1.875ns or 1.25ns). This result is tCK (avg) (max.)
corresponding to CL selected.
Data Sheet E1248E40 (Ver. 4.0)
48
ELPIDA [ ELPIDA MEMORY ]
