Figure 73: READ (BC4) to WRITE (BC4) OTF
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
T14
T15
CK#
CK
Command1
READ
NOP
NOP
NOP
WRITE
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
tWR
tWTR
READ-to-WRITE command delay = RL + tCCD/2 + 2tCK - WL
tBL = 4 clocks
Bank,
Col n
Bank,
Col b
Address2
tRPRE
tRPST
tWPRE
tWPST
DQS, DQS#
DO
n
DO
DO
DO
DI
n
DI
DI
DI
3
DQ
n+ 1 n+ 2
n + 3
n + 1 n + 2 n+ 3
RL = 5
WL = 5
Transitioning Data
Don’t Care
1. NOP commands are shown for ease of illustration; other commands may be valid at these times.
Notes:
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 74: READ to PRECHARGE (BL8)
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
ACT
T14
T15
T16
T17
CK#
CK
Command
READ
NOP
NOP
NOP
NOP
PRE
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
Bank a,
Col n
Bank a,
(or all)
Bank a,
Row b
Address
tRTP
tRP
DQS, DQS#
DQ
DO
n
DO
n + 1
DO
DO
n + 3
DO
DO
DO
n + 6
DO
n + 2
n + 4
n + 5
n + 7
tRAS
Transitioning Data
Don’t Care
MICRON [ MICRON TECHNOLOGY ]
