参数资料
型号: MT46V32M8BG-6AT:G
元件分类: DRAM
英文描述: 32M X 8 DDR DRAM, 0.7 ns, PBGA60
封装: (8 X 14) MM, LEAD FREE,PLASTIC, FBGA-60
文件页数: 71/93页
文件大小: 3632K
PDF: 09005aef80768abb/Source: 09005aef82a95a3a
Micron Technology, Inc., reserves the right to change products or specifications without notice.
DDR_x4x8x16_Core2.fm - 256Mb DDR: Rev. O, Core DDR: Rev. B 1/09 EN
71
2003 Micron Technology, Inc. All rights reserved.
256Mb: x4, x8, x16 DDR SDRAM
Operations
Figure 36:
x16 Data Output Timing – tDQSQ, tQH, and Data Valid Window
Notes:
1. tHP is the lesser of tCL or tCH clock transition collectively when a bank is active.
2. tDQSQ is derived at each DQS clock edge, is not cumulative over time, begins with DQS
transition, and ends with the last valid DQ transition.
3. DQ transitioning after DQS transition define the tDQSQ window. LDQS defines the lower
byte, and UDQS defines the upper byte.
4. DQ0, DQ1, DQ2, DQ3, DQ4, DQ5, DQ6, or DQ7.
5. tQH is derived from tHP: tQH = tHP - tQHS.
6. The data valid window is derived for each DQS transition and is tQH - tDQSQ.
7. DQ8, DQ9, DQ10, D11, DQ12, DQ13, DQ14, or DQ15.
DQ (last data valid)
4
DQ
4
DQ
4
DQ
4
DQ
4
DQ
4
DQ
4
LDQS3
DQ (last data valid)
4
DQ (first data no longer valid)
4
DQ (first data no longer valid)
4
DQ0–DQ7 and LDQS collectively
6
T2
T2n
T3
T3n
CK
CK#
T1
T2
T3
T4
T2n
T3n
tQH5
tDQSQ2
Data valid
window
Data valid
window
DQ (last data valid)
7
DQ
7
DQ
7
DQ
7
DQ
7
DQ
7
DQ
7
UDQS
3
DQ (last data valid)
7
DQ (first data no longer valid)
7
DQ (first data no longer valid)
7
DQ8–DQ15 and UDQS collectively
6
T2
T2n
T3
T3n
tQH5
tDQSQ2
tHP1
tQH5
Data valid
window
Data valid
window
Data valid
window
Data valid
window
Data valid
window
Upper
b
yte
Lower
b
yte
Data valid
window
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