E1922E20 Datasheet, PDF (18/29 Pages) Elpida Memory – 4G bits DDR3L SDRAM

EDJ4204EFBG, EDJ4208EFBG, EDJ4216EFBG
Table 14: IDD7 Measurement-Loop Pattern
CK,
Sub Cycle
Com-
A11
A7 A3 A0
/CK
CKE -Loop number mand /CS /RAS /CAS /WE ODT BA*³ -Am A10 -A9 -A6 -A2 Data*²
0
ACT 0
0
1
10
0 0 0 000⎯
1
0
2
RDA 0
1
0
10
0 0 1 0 0 0 00000000
D
1
0
0
00
0 0 0 000⎯
…
Repeat above D Command until nRRD − 1
nRRD
ACT 0
0
1
10
1 0 0 0F0 ⎯
nRRD + 1 RDA 0
1
0
10
1 0 1 0 F 0 00110011
1
nRRD + 2 D
1
0
0
00
1 0 0 0F0 ⎯
…
Repeat above D Command until 2 × nRRD − 1
2
2 × nRRD Repeat Sub-Loop 0, but BA= 2
3
3 × nRRD Repeat Sub-Loop 1, but BA= 3
D
1
0
0
00
3 0 0 0F0 ⎯
4
4 × nRRD
Assert and repeat above D Command until nFAW − 1, if necessary
5
nFAW
Repeat Sub-Loop 0, but BA= 4
nFAW
6
Repeat Sub-Loop 1, but BA= 5
+ nRRD
7
8
9
Toggling Static H ₁₀
11
12
13
14
15
16
17
18
19
nFAW
+ 2 × nRRD
Repeat Sub-Loop 0, but BA= 6
nFAW
+ 3 × nRRD ^{Repeat Sub-Loop 1, but BA= 7}
nFAW
D
1
0
0
00
7 0 0 0F0 ⎯
+ 4 × nRRD Assert and repeat above D Command until 2 × nFAW − 1, if necessary
2 × nFAW _ACT
0
0
1
10
0 0 0 0F0 ⎯
+0
2 × nFAW
+1
RDA 0
1
0
10
0 0 1 0 F 0 00110011
2 × nFAW D
1
0
0
00
0 0 0 0F0 ⎯
+2
Repeat above D Command until 2 × nFAW + nRRD − 1
2 × nFAW _ACT
0
+ nRRD
0
1
10
1 0 0 000⎯
2 × nFAW _RDA
0
1
0
10
1 0 1 0 0 0 00000000
+ nRRD + 1
2 × nFAW D
1
0
0
00
1 0 0 000⎯
+ nRRD + 2 Repeat above D Command until 2 × nFAW + 2 × nRRD − 1
2 × nFAW
+2 × nRRD ^{Repeat Sub-Loop 10, but BA= 2}
2 × nFAW
+ 3 × nRRD ^{Repeat Sub-Loop 11, but BA= 3}
2 × nFAW D
1
0
0
00
3 0 0 000⎯
+ 4 × nRRD Assert and repeat above D Command until 3 × nFAW − 1, if necessary
3 × nFAW Repeat Sub-Loop 10, but BA= 4
3 × nFAW _{Repeat Sub-Loop 11, but BA= 5}
+nRRD
3 × nFAW
+ 2 × nRRD
Repeat Sub-Loop 10, but BA= 6
3 × nFAW
+ 3 × nRRD ^{Repeat Sub-Loop 11, but BA= 7}
3 × nFAW D
1
0
0
00
7 0 0 000⎯
+ 4 × nRRD Assert and repeat above D Command until 4 × nFAW − 1, if necessary
Notes: 1.
2.
3.
4.
DM must be driven low all the time. DQS, /DQS are used according to read commands, otherwise MID-LEVEL.
Burst sequence driven on each DQ signal by read command. Outside burst operation, DQ signals are MID-LEVEL.
BA: BA0 to BA2.
Am: m means Most Significant Bit (MSB) of Row address.
Data Sheet E1922E20 (Ver. 2.0)
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