Table 12 - IDD7 Measurement-Loop Pattern1
Data3
0 0
1
ACT
RDA
0
0
0
1
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
-
D0=00, D1=FF
D2=FF, D3=00
D4=FF, D5=00
D6=00, D7=FF
-
2
3
D
D#
1
1
0
1
0
1
0
1
0
1
0
0
0
0
0
32
0
3
0
0
0
0
0
0
0
7
0
F
0
0
-
...
1 nRRD
nRRD + 1
repeat pattern 2...3 until nRRD - 1, if nRCD > 4. Truncate if necessary
ACT
RDA
0
0
0
1
0
1
0
0
0
1
0
0
0
1
1
1
1
0
0
0
0
0
1
0
0
0
0
0
0
-
D0=FF, D1=00
D2=00, D3=FF
D4=00, D5=FF
D6=FF, D7=00
...
repeat pattern 2 ... 3 until 2*nRRD - 1, if nRCD > 4. Truncate if necessary
repeat Sub-Loop 0, use BG[1:0] = 0, BA[1:0] = 2 instead
repeat Sub-Loop 1, use BG[1:0] = 1, BA[1:0] = 3 instead
2 2*nRRD
3 3*nRRD
4 4*nRRD
repeat pattern 2 ... 3 until nFAW - 1, if nFAW > 4*nRCD. Truncate if necessary
5 nFAW
6 nFAW + nRRD
repeat Sub-Loop 0, use BG[1:0] = 0, BA[1:0] = 1 instead
repeat Sub-Loop 1, use BG[1:0] = 1, BA[1:0] = 2 instead
7 nFAW + 2*nRRD repeat Sub-Loop 0, use BG[1:0] = 0, BA[1:0] = 3 instead
8 nFAW + 3*nRRD repeat Sub-Loop 1, use BG[1:0] = 1, BA[1:0] = 0 instead
9 nFAW + 4*nRRD repeat Sub-Loop 4
10 2*nFAW
repeat Sub-Loop 0, use BG[1:0] = 2, BA[1:0] = 0 instead
11 2*nFAW + nRRD repeat Sub-Loop 1, use BG[1:0] = 3, BA[1:0] = 1 instead
12 2*nFAW + 2*nRRD repeat Sub-Loop 0, use BG[1:0] = 2, BA[1:0] = 2 instead
13 2*nFAW + 3*nRRD repeat Sub-Loop 1, use BG[1:0] = 3, BA[1:0] = 3 instead
14 2*nFAW + 4*nRRD repeat Sub-Loop 4
15 3*nFAW
repeat Sub-Loop 0, use BG[1:0] = 2, BA[1:0] = 1 instead
16 3*nFAW + nRRD repeat Sub-Loop 1, use BG[1:0] = 3, BA[1:0] = 2 instead
17 3*nFAW + 2*nRRD repeat Sub-Loop 0, use BG[1:0] = 2, BA[1:0] = 3 instead
18 3*nFAW + 3*nRRD
repeat Sub-Loop 1, use BG[1:0] = 3, BA[1:0] = 0 instead
19 3*nFAW + 4*nRRD repeat Sub-Loop 4
20 4*nFAW
repeat pattern 2 ... 3 until nRC - 1, if nRC > 4*nFAW. Truncate if necessary
NOTE :
1. DQS_t, DQS_c are VDDQ.
2. C2 is a don’t care for 2H and 4H 3DS devices. C1 is a don’t care for 2H 3DS devices.
3. Burst Sequence driven on each DQ signal by Read Command. Outside burst operation, DQ signals are VDDQ.
Rev. 1.0 / Feb.2020
63