MT47H32M16HR-25E L:G Micron Technology Inc, MT47H32M16HR-25E L:G Datasheet - Page 76
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MT47H32M16HR-25E L:G
Manufacturer Part Number
MT47H32M16HR-25E L:G
Description
Manufacturer
Micron Technology Inc
Datasheet
1.MT47H32M16HR-25E_LG.pdf
(131 pages)
Specifications of MT47H32M16HR-25E L:G
Lead Free Status / RoHS Status
Compliant
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- Download datasheet (10Mb)
Burst Type
Table 41: Burst Definition
Operating Mode
DLL RESET
PDF: 09005aef82f1e6e2
512MbDDR2.pdf - Rev. Q 10/10 EN
Burst Length
4
8
Starting Column Address
Accesses within a given burst may be programmed to be either sequential or inter-
leaved. The burst type is selected via bit M3, as shown in Figure 34. The ordering of
accesses within a burst is determined by the burst length, the burst type, and the start-
ing column address, as shown in Table 41. DDR2 SDRAM supports 4-bit burst mode
and 8-bit burst mode only. For 8-bit burst mode, full interleaved address ordering is
supported; however, sequential address ordering is nibble-based.
The normal operating mode is selected by issuing a command with bit M7 set to “0,”
and all other bits set to the desired values, as shown in Figure 34 (page 75). When bit M7
is “1,” no other bits of the mode register are programmed. Programming bit M7 to “1”
places the DDR2 SDRAM into a test mode that is only used by the manufacturer and
should not be used. No operation or functionality is guaranteed if M7 bit is “1.”
DLL RESET is defined by bit M8, as shown in Figure 34. Programming bit M8 to “1” will
activate the DLL RESET function. Bit M8 is self-clearing, meaning it returns back to a
value of “0” after the DLL RESET function has been issued.
Anytime the DLL RESET function is used, 200 clock cycles must occur before a READ
command can be issued to allow time for the internal clock to be synchronized with the
external clock. Failing to wait for synchronization to occur may result in a violation of
the
(A2, A1, A0)
t
AC or
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0
0 1
1 0
1 1
t
DQSCK parameters.
Burst Type = Sequential
76
0, 1, 2, 3, 4, 5, 6, 7
1, 2, 3, 0, 5, 6, 7, 4
2, 3, 0, 1, 6, 7, 4, 5
3, 0, 1, 2, 7, 4, 5, 6
4, 5, 6, 7, 0, 1, 2, 3
5, 6, 7, 4, 1, 2, 3, 0
6, 7, 4, 5, 2, 3, 0, 1
7, 4, 5, 6, 3, 0, 1, 2
0, 1, 2, 3
1, 2, 3, 0
2, 3, 0, 1
3, 0, 1, 2
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Order of Accesses Within a Burst
512Mb: x4, x8, x16 DDR2 SDRAM
Burst Type = Interleaved
Mode Register (MR)
© 2004 Micron Technology, Inc. All rights reserved.
0, 1, 2, 3, 4, 5, 6, 7
1, 0, 3, 2, 5, 4, 7, 6
2, 3, 0, 1, 6, 7, 4, 5
3, 2, 1, 0, 7, 6, 5, 4
4, 5, 6, 7, 0, 1, 2, 3
5, 4, 7, 6, 1, 0, 3, 2
6, 7, 4, 5, 2, 3, 0, 1
7, 6, 5, 4, 3, 2, 1, 0
0, 1, 2, 3
1, 0, 3, 2
2, 3, 0, 1
3, 2, 1, 0
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