Datasheet

Table 90. IDD7 Measurement - Loop Pattern
[1]
CK/
CK#
CKE
Sub-
Loop
Cycle
Number
CMD
CS#
ACT#
RAS#/
A16
CAS#/
A15
WE#/
A14
ODT
BG0-1
[2]
BA0-1
A12/
BC#
A13,
A11
A10
A9-A7
A6-A3
A2-A0
Data
[3]
Toggling
Static High
0
0
ACT
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-
0
1
RDA
0
1
1
0
1
0
0
0
0
0
1
0
0
0
D0=00,
D1=FF
D2=FF,
D3=00
D4=FF,
D5=00
D6=00,
D7=FF
0
2
D
1
0
0
0
0
0
0
0
0
0
0
0
0
0
-
0
3
D#
1
1
1
1
1
0
3
[2]
3
0
0
0
7
F
0
-
0
…
Repeat pattern 2...3, until nRRD - 1, if nRRD > 4. Truncate if necessary
1
nRRD
ACT
0
0
0
0
0
0
1
1
0
0
0
0
0
0
1
nRRD+1
RDA
0
1
1
0
1
0
1
1
0
0
1
0
0
0
D0=FF,
D1=00
D2=00,
D3=FF
D4=00,
D5=FF
D6=FF,
D7=00
1
…
Repeat pattern 2...3, until 2×nRRD - 1, if nRRD > 4. Truncate if necessary
2
2×nRRD
Repeat Sub-Loop 0, use BG[1:0] = 0, BA[1:0] = 2 instead
3
3×nRRD
Repeat Sub-Loop 1, use BG[1:0] = 1, BA[1:0] = 3 instead
4
4×nRRD
Repeat pattern 2 ... 3 until nFAW - 1, if nFAW > 4×nRRD. Truncate if necessary
5
nFAW
Repeat Sub-Loop 0, use BG[1:0] = 0, BA[1:0] = 1 instead
6
nFAW+
nRRD
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
For x4
and
x8 only
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, DQS# are V
DDQ
.
Note 2. BG1 is don’t care for x16 device.
Note 3. Burst Sequence driven on each DQ signal by Read Command. Outside burst operation, DQ signals are V
DDQ
.
AS4C256M16D4
Confidential
- 178 of 201 -
Rev.1.0 Aug.2019