Datasheet

Figure 70: READ (BC4) to WRITE (BC4) OTF
Don’t CareTransitioning Data
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15
CK
CK#
Address
2
Command
1
t
WPST
t
WPRE
t
RPST
DQS, DQS#
DQ
3
WL = 5
t
WR
t
WTR
t
BL = 4 clocks
t
RPRE
RL = 5
READ-to-WRITE command delay = RL +
t
CCD/2 + 2
t
CK - WL
READ
DO
n
DO
n + 1
DO
n + 2
DO
n + 3
DI
n
DI
n + 1
DI
n + 2
DI
n + 3
Bank,
Col b
Bank,
Col n
NOP NOP NOP WRITE NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP
Notes:
1. NOP commands are shown for ease of illustration; other commands may be valid at these times. 2. The BC4 OTF setting is activated by MR0[1:0] and A12 = 0 during READ command at T0 and WRITE command at
T4.
3. DO n = data-out from column n; DI n = data-in from column b. 4. BC4, RL = 5 (AL - 0, CL = 5), WL = 5 (AL = 0, CWL = 5).
Figure 71: READ to PRECHARGE (BL8)
t
RAS
t
RTP
CK
CK#
Command
NOP NOP NOP NOP
Address
DQ
DQS, DQS#
Don’t CareTransitioning Data
NOP NOP NOP NOP NOP ACT NOP NOP NOP NOP
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17
NOPREAD
Bank a,
Col n
NOP PRE
Bank a,
(or all)
Bank a,
Row b
t
RP
DO
n
DO
n + 1
DO
n + 2
DO
n + 3
DO
n + 4
DO
n + 5
DO
n + 6
DO
n + 7
8Gb: x4, x8, x16 DDR3L SDRAM
READ Operation
157
Rev 2.0 June 2016
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