K4B4G0446B Datasheet, PDF (36/59 Pages) Samsung semiconductor – DDP 4Gb B-die DDR3 SDRAM Specification

K4B4G0446B
K4B4G0846B
[ Table 39 ] IDD7 Measurement - Loop Pattern¹
DDP 4Gb DDR3 SDRAM
0
ACT
0 0 1 1 0 0 00 0 0 0 0
1
0
2
RDA
D
0 1 0 1 0 0 00 1 0 0 0
1 0 0 0 0 0 00 0 0 0 0
...
nRRD
repeat above D Command until nRRD - 1
ACT
0 0 1 1 0 1 00 0 0 F 0
nRRD + 1
1
nRRD + 2
RDA
D
0 1 0 1 0 1 00 1 0 F 0
1 0 0 0 0 1 00 0 0 F 0
...
repeat above D Command until 2*nRRD-1
2
2 * nRRD
repeat Sub-Loop 0, but BA[2:0] = 2
3
3 * nRRD
repeat Sub-Loop 1, but BA[2:0] = 3
D
1 0 0 0 0 3 00 0 0 F 0
4
4 * nRRD
Assert and repeat above D Command until nFAW - 1, if necessary
5
nFAW
repeat Sub-Loop 0, but BA[2:0] = 4
6
nFAW+nRRD
repeat Sub-Loop 1, but BA[2:0] = 5
7
nFAW+2*nRRD repeat Sub-Loop 0, but BA[2:0] = 6
8
nFAW+3*nRRD repeat Sub-Loop 1, but BA[2:0] = 7
D
1 0 0 0 0 7 00 0 0 F 0
9
nFAW+4*nRRD
Assert and repeat above D Command until 2*nFAW - 1, if necessary
2*nFAW+0
ACT
0 0 1 1 0 0 00 0 0 F 0
2*nFAW+1
RDA
0 1 0 1 0 0 00 1 0 F 0
10
D
1 0 0 0 0 0 00 0 0 F 0
2*nFAW+2
Repeat above D Command until 2*nFAW + nRRD - 1
2*nFAW+nRRD
ACT
0 0 1 1 0 1 00 0 0 0 0
2*nFAW+nRRD+1
RDA
0 1 0 1 0 1 00 1 0 0 0
11
D
1 0 0 0 0 1 00 0 0 0 0
2*nFAW+nRRD+2
Repeat above D Command until 2*nFAW + 2*nRRD - 1
12 2*nFAW+2*nRRD repeat Sub-Loop 10, but BA[2:0] = 2
13 2*nFAW+3*nRRD repeat Sub-Loop 11, but BA[2:0] = 3
D
1 0 0 0 0 3 00 0 0 0 0
14 2*nFAW+4*nRRD
Assert and repeat above D Command until 3*nFAW - 1, if necessary
15
3*nFAW
repeat Sub-Loop 10, but BA[2:0] = 4
16
3*nFAW+nRRD repeat Sub-Loop 11, but BA[2:0] = 5
17 3*nFAW+2*nRRD repeat Sub-Loop 10, but BA[2:0] = 6
18 3*nFAW+3*nRRD repeat Sub-Loop 11, but BA[2:0] = 7
D
1 0 0 0 0 7 00 0 0 0 0
19 3*nFAW+4*nRRD
Assert and repeat above D Command until 4*nFAW - 1, if necessary
Note :
1. DM must be driven LOW all the time. DQS, DQS are used according to RD Commands, otheerwise MID-LEVEL.
2. Burst Sequence driven on each DQ signal by Read Command. Outside burst operation. DQ signals are MID-LEVEL.
-
00000000
-
-
00110011
-
-
-
-
00110011
-
-
00000000
-
-
-
Page 36 of 59
Rev. 1.0 March 2009