mt47h128m16hg-3-it Micron Semiconductor Products, mt47h128m16hg-3-it Datasheet - Page 43

• Manufacturer Part Number: mt47h128m16hg-3-it
• Description: 2gb X4, X8, X16 Ddr2 Sdram
• Manufacturer: Micron Semiconductor Products

Figure 24:
Figure 25:
Figure 26:
PDF: 09005aef824f87b6/Source: 09005aef824f1182
2gb_ddr2.fm - Rev. A 9/06 EN
COMMAND
DQS, DQS#
CK#
DQ
CK
ACTIVE n
T0
READ-to-PRECHARGE – BL = 4
READ-to-PRECHARGE – BL = 8
READ-to-WRITE
READ n
Notes:
Notes:
Notes:
T1
t RCD = 3
COMMAND
1. RL = 4 (AL = 1, CL = 3); BL = 4.
2.
3. Shown with nominal
1. RL = 4 (AL = 1, CL = 3); BL = 8.
2.
3. Shown with nominal
1. BL = 4; CL = 3; AL = 2.
2. Shown with nominal
DQS, DQS#
COMMAND
DQS, DQS#
NOP
AL = 2
ADDRESS
ADDRESS
T2
t
t
RTP ≥ 2 clocks.
RTP ≥ 2 clocks.
CK#
A10
CK#
A10
DQ
CK
DQ
CK
Bank a
Bank a
READ
READ
T0
NOP
NOP
T0
T3
AL + BL/2 + MAX( t RTP/ t CK or 2CK) - 2CK
AL = 1
RL = 5
AL = 1
first 4-bit
prefetch
NOP
T1
NOP
NOP
prefetch
T4
4-bit
NOP
T1
t
t
t
AC,
AC,
AC,
CL = 3
AL + BL/2 + MAX( t RTP/ t CK or 2CK) -2CK
≥ t RAS (MIN)
≥ t RAS (MIN)
t
t
t
WRITE n
NOP
DQSCK, and
DQSCK, and
WRITE
DQSCK, and
≥ t RTP (MIN)
T2
T5
CL = 3
43
NOP
T2
second 4-bit
CL = 3
≥ t RC (MIN)
prefetch
NOP
T3
NOP
NOP
T6
Micron Technology, Inc., reserves the right to change products or specifications without notice.
≥ t RC (MIN)
PRECHG
t
t
t
D
Bank a
DQSQ.
DQSQ.
DQSQ.
Valid
OUT
n
T3
n + 1
D
≥ t RTP (MIN)
WL = RL - 1 = 4
OUT
NOP
T4
NOP
T7
2Gb: x4, x8, x16 DDR2 SDRAM
D
n + 2
D
OUT
OUT
NOP
T4
TRANSITIONING DATA
D
OUT
D
n + 3
D
Bank a
OUT
PRECHG
OUT
Valid
T5
≥ t RP (MIN)
NOP
T8
D
OUT
TRANSITIONING DATA
D
OUT
D
NOP
T5
OUT
TRANSITIONING DATA
©2006 Micron Technology, Inc. All rights reserved.
D
NOP
T6
OUT
NOP
T9
D
n
D
IN
READ Command
OUT
≥ t RP (MIN)
D
n + 1
OUT
D
DON’T CARE
D
ACTIVE
IN
Bank a
OUT
Valid
T6
NOP
T7
NOP
n + 2
T10
D
D
IN
OUT
DON’T CARE
n + 3
D
D
IN
DON’T CARE
OUT
ACTIVE
Bank a
Valid
NOP
T8
T7
NOP
T11