MT47H128M16HG-3 IT:A Micron Technology Inc, MT47H128M16HG-3 IT:A Datasheet - Page 105
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MT47H128M16HG-3 IT:A
Manufacturer Part Number
MT47H128M16HG-3 IT:A
Description
Manufacturer
Micron Technology Inc
Type
DDR2 SDRAMr
Datasheet
1.MT47H128M16HG-3_ITA.pdf
(134 pages)
Specifications of MT47H128M16HG-3 IT:A
Organization
128Mx16
Address Bus
17b
Access Time (max)
4.5ns
Maximum Clock Rate
667MHz
Operating Supply Voltage (typ)
1.8V
Package Type
FBGA
Operating Temp Range
-40C to 85C
Operating Supply Voltage (max)
1.9V
Operating Supply Voltage (min)
1.7V
Supply Current
275mA
Pin Count
84
Mounting
Surface Mount
Operating Temperature Classification
Industrial
Lead Free Status / RoHS Status
Compliant
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Table 43: WRITE Using Concurrent Auto Precharge
PDF: 09005aef824f87b6
2gbddr2.pdf – Rev. F 12/10 EN
WRITE with auto precharge
From Command
(Bank n)
the WRITE diagrams show the nominal case, and where the two extreme cases (
[MIN] and
(page 106) shows the nominal case and the extremes of
tion of a burst, assuming no other commands have been initiated, the DQ will remain
High-Z and any additional input data will be ignored.
Data for any WRITE burst may be concatenated with a subsequent WRITE command to
provide continuous flow of input data. The first data element from the new burst is ap-
plied after the last element of a completed burst. The new WRITE command should be
issued x cycles after the first WRITE command, where x equals BL/2.
Figure 59 (page 107) shows concatenated bursts of BL = 4 and how full-speed random
write accesses within a page or pages can be performed. An example of nonconsecutive
WRITEs is shown in Figure 60 (page 107). DDR2 SDRAM supports concurrent auto pre-
charge options, as shown in Table 43.
DDR2 SDRAM does not allow interrupting or truncating any WRITE burst using BL = 4
operation. Once the BL = 4 WRITE command is registered, it must be allowed to com-
plete the entire WRITE burst cycle. However, a WRITE BL = 8 operation (with auto
precharge disabled) might be interrupted and truncated only by another WRITE burst
as long as the interruption occurs on a 4-bit boundary due to the 4n-prefetch architec-
ture of DDR2 SDRAM. WRITE burst BL = 8 operations may not be interrupted or
truncated with any command except another WRITE command, as shown in Figure 61
(page 108).
Data for any WRITE burst may be followed by a subsequent READ command. To follow
a WRITE,
cycles required to meet
WRITE burst may be followed by a subsequent PRECHARGE command.
met, as shown in Figure 63 (page 110).
less of the data mask condition.
WRITE or WRITE with auto precharge
READ or READ with auto precharge
t
PRECHARGE or ACTIVATE
WTR should be met, as shown in Figure 62 (page 109). The number of clock
t
DQSS [MAX]) might not be intuitive, they have also been included. Figure 58
To Command
(Bank m)
t
WTR is either 2 or
105
t
Micron Technology, Inc. reserves the right to change products or specifications without notice.
WR starts at the end of the data burst, regard-
t
WTR/
(with Concurrent Auto Precharge)
2Gb: x4, x8, x16 DDR2 SDRAM
t
CK, whichever is greater. Data for any
(CL - 1) + (BL/2) +
Minimum Delay
t
DQSS for BL = 4. Upon comple-
(BL/2)
1
© 2006 Micron Technology, Inc. All rights reserved.
t
WTR
t
WR must be
WRITE
t
DQSS
Units
t
t
t
CK
CK
CK
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