Internet Data Sheet
HY[B/I]25D256[16/40/80]0C[E/C/F/T](L)
256 Mbit Double-Data-Rate SDRAM
TABLE 8
Burst Definition
Burst Length
Starting Column Address
Order of Accesses Within a Burst
A2
A1
A0
Type = Sequential
Type = Interleaved
2
4
—
—
—
—
—
—
0
—
—
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0-1
0-1
1-0
1-0
0-1-2-3
0-1-2-3
0
1-2-3-0
1-0-3-2
1
2-3-0-1
2-3-0-1
1
3-0-1-2
3-2-1-0
8
0
0-1-2-3-4-5-6-7
1-2-3-4-5-6-7-0
2-3-4-5-6-7-0-1
3-4-5-6-7-0-1-2
4-5-6-7-0-1-2-3
5-6-7-0-1-2-3-4
6-7-0-1-2-3-4-5
7-0-1-2-3-4-5-6
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
0
0
1
0
1
1
0
1
0
1
1
1
1
Notes
1. For a burst length of two, A1-Ai selects the two-data-element block; A0 selects the first access within the block.
2. For a burst length of four, A2-Ai selects the four-data-element block; A0-A1 selects the first access within the block.
3. For a burst length of eight, A3-Ai selects the eight-data- element block; A0-A2 selects the first access within the block.
4. Whenever a boundary of the block is reached within a given sequence above, the following access wraps within the block.
Rev. 2.3, 2007-03
15
03062006-8CCM-VPUW
QIMONDA [ QIMONDA AG ]
