MT47H128M16RT-25EC Datasheet, PDF (85/134 Pages) Micron Technology – DDR2 SDRAM MT47H512M4 – 64 Meg x 4 x 8 banks MT47H256M8 – 32 Meg x 8 x 8 banks MT47H128M16 – 16 Meg x 16 x 8 banks

2Gb: x4, x8, x16 DDR2 SDRAM
Extended Mode Register (EMR)
Figure 39: 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 40: 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: 09005aef824f87b6
2Gb_DDR2.pdf – Rev. H 10/11 EN
85
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