Datasheet

Rev. 1.0/Sep. 2012 41
Table 4 - IDD1 Measurement-Loop Pattern
a)
a) DM must be driven LOW all the time. DQS, DQS are used according to RD Commands, otherwise MID-
LEVEL.
b) Burst Sequence driven on each DQ signal by Read Command. Outside burst operation, DQ signals are
MID_LEVEL.
CK, CK
CKE
Sub-Loop
Cycle
Number
Command
CS
RAS
CAS
WE
ODT
BA[2:0]
A[15:11]
A[10]
A[9:7] A[6:3]
A[2:0]
Data
b)
toggling
Static High
0
0
ACT001100000000 -
1,2 D, D 1 0 0 0 0 0 00 0 0 0 0 -
3,4 D, D 111100000000 -
... repeat pattern 1...4 until nRCD - 1, truncate if necessary
nRCD RD 0 1 0 1 0 0 00 0 0 0 0 00000000
... repeat pattern 1...4 until nRAS - 1, truncate if necessary
nRAS PRE001000000000 -
... repeat pattern 1...4 until nRC - 1, truncate if necessary
1*nRC+0 ACT 0 0 1 1 0 0 00 0 0 F 0 -
1*nRC+1,2 D, D 1 0 0 0 0 0 00 0 0 F 0 -
1*nRC+3,4 D
, D 1111000000F0 -
... repeat pattern nRC + 1,...4 until nRC + nRCE - 1, truncate if necessary
1*nRC+nRCD RD 0 1 0 1 0 0 00 0 0 F 0 00110011
... repeat pattern nRC + 1,...4 until nRC + nRAS - 1, truncate if necessary
1*nRC+nRAS PRE 0 0 1 0 0 0 00 0 0 F 0 -
... repeat pattern nRC + 1,...4 until *2 nRC - 1, truncate if necessary
1 2*nRC repeat Sub-Loop 0, use BA[2:0] = 1 instead
2 4*nRC repeat Sub-Loop 0, use BA[2:0] = 2 instead
3 6*nRC repeat Sub-Loop 0, use BA[2:0] = 3 instead
4 8*nRC repeat Sub-Loop 0, use BA[2:0] = 4 instead
5 10*nRC repeat Sub-Loop 0, use BA[2:0] = 5 instead
6 12*nRC repeat Sub-Loop 0, use BA[2:0] = 6 instead
7 14*nRC repeat Sub-Loop 0, use BA[2:0] = 7 instead