MT47H16M16BG-3ITB Datasheet, PDF (80/129 Pages) Micron Technology – 256Mb: x4, x8, x16 DDR2 SDRAM

256Mb: x4, x8, x16 DDR2 SDRAM
Extended Mode Register (EMR)
Figure 37: READ Latency
CK#
CK
Command
T0
ACTIVE n
DQS, DQS#
DQ
T1
T2
READ n
NOP
tRCD _(MIN)
AL = 2
T3
T4
T5
NOP
NOP
NOP
RL = 5
CL = 3
Notes:
1. BL = 4.
2. Shown with nominal ^tAC, ^tDQSCK, and ^tDQSQ.
3. RL = AL + CL = 5.
T6
T7
T8
NOP
NOP
NOP
DO
DO
DO
DO
n
n+1 n+2 n+3
Transitioning Data
Don’t Care
Figure 38: WRITE Latency
CK#
CK
Command
T0
ACTIVE n
DQS, DQS#
DQ
T1
T2
T3
T4
WRITE n
NOP
tRCD _(MIN)
AL = 2
NOP
NOP
CL - 1 = 2
WL = AL + CL - 1 = 4
Notes: 1. BL = 4.
2. CL = 3.
3. WL = AL + CL - 1 = 4.
T5
T6
T7
NOP
NOP
NOP
DI
DI
DI
DI
n
n+1 n+2 n+3
Transitioning Data
Don’t Care
PDF: 09005aef8117c187
256MbDDR2.pdf - Rev. N 7/11 EN
80
Micron Technology, Inc. reserves the right to change products or specifications without notice.
‹ 2003 Micron Technology, Inc. All rights reserved.