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6402 Datasheet(PDF) 119 Page - Intel Corporation

Part # 6402
Description  Advanced Memory Buffer
PDF  250 Pages
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

6402 Datasheet(HTML) 119 Page - Intel Corporation

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Intel® 6400/6402 Advanced Memory Buffer Datasheet
119
DDR MemBIST
11.3.2.4.2
Fast X
Figure 11-3 below depicts how Fast X with decrementing addresses cycles through a
range of addresses specified by MB_START_ADDR and MB_END_ADDR. In this
execution mode, Z, or bank address, is held constant (except in the case of dynamic
address inversion mode, DAI, mentioned later). Note that the X address counter
counts down from Xe to Xs before decrementing the Y address counter and beginning
again at Xe. This process continues until both the X and Y address counters reach their
end Xs and Ys values simultaneously. This ending condition results in the address range
being covered once. The name “Fast X” is descriptive of this testing order in which the
X address range changes faster than the Y address range.
Figure 11-2. Fast Y Address Sequencing
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
E
18
One Bank
0 Increasing Y
Increasing X
0
Address space as set by values in MTR register
Address space as set by start and end values in
MB_START_ADDR and MB_END_ADDR registers
0001
Fast Y address sequencing, increasing
address, specified address range



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