MT47H32M16HR-187E:G Micron Technology Inc, MT47H32M16HR-187E:G Datasheet - Page 103
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MT47H32M16HR-187E:G
Manufacturer Part Number
MT47H32M16HR-187E:G
Description
IC DDR2 SDRAM 512MBIT 84FBGA
Manufacturer
Micron Technology Inc
Series
-r
Datasheet
1.MT47H32M16HR-187EG.pdf
(132 pages)
Specifications of MT47H32M16HR-187E:G
Format - Memory
RAM
Memory Type
DDR2 SDRAM
Memory Size
512M (32Mx16)
Speed
1.875ns
Interface
Parallel
Voltage - Supply
1.7 V ~ 1.9 V
Operating Temperature
0°C ~ 85°C
Package / Case
84-TFBGA
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MT47H32M16HR-187E:G
Manufacturer:
Micron Technology Inc
Quantity:
10 000
Table 43: WRITE Using Concurrent Auto Precharge
PDF: 09005aef82f1e6e2
512MbDDR2.pdf - Rev. R 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 104) 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 57 (page 105) 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 58 (page 105). 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 59
(page 106).
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 61 (page 108).
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 60 (page 107). The number of clock
t
DQSS [MAX]) might not be intuitive, they have also been included. Figure 56
To Command
(Bank m)
t
WTR is either 2 or
103
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
512Mb: x4, x8, x16 DDR2 SDRAM
WTR/
(with Concurrent Auto Precharge)
t
CK, whichever is greater. Data for any
(CL - 1) + (BL/2) +
Minimum Delay
t
DQSS for BL = 4. Upon comple-
(BL/2)
1
© 2004 Micron Technology, Inc. All rights reserved.
t
WTR
t
WR must be
WRITE
t
DQSS
Units
t
t
t
CK
CK
CK