Data Sheet
HY[B/I]39S128[40/80/16][0/7]F[E/T](L)
128-MBit Synchronous DRAM
TABLE 7
Burst Length and Sequence
Burst Length
Starting Column Address
A2
2
4
0
0
1
1
8
0
0
0
0
1
1
1
1
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Notes
1.
2.
3.
4.
For a burst length of two, A1-Ai selects the two-data-element block; A0 selects the first access within the block.
For a burst length of four, A2-Ai selects the four-data-element block; A0-A1 selects the first access within the block.
For a burst length of eight, A3-Ai selects the eight-data- element block; A0-A2 selects the first access with in the block.
Whenever a boundary of the block is reached within a given sequence above, the following access wraps within the block.
n
0
0
1
1
0
0
1
1
A1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Order of Accesses Within a Burst
Type=Sequential
0–1
1–0
0–1–2–3
1–2–3–0
2–3–0–1
3–0–1–2
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
Cn, Cn+1, Cn+2 ....
Type=Interleaved
0–1
1–0
0–1–2–3
1–0–3–2
2–3–0–1
3–2–1–0
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
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Rev. 1.32, 2007-10
10122006-I6LJ-WV3H
11
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