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Chapter 2
MA mapping for Row and Column Address for SDRAM
Size/
BA BA 12 11 10 9
SDRAM
(0) (1)
Depth
64M
Col
4-bank
12X8
Row
13* 12*
16M
Col
2-bank
11X9
Row
12*
16M
Col
2-bank
11X10
Row
12*
128M
Col
4-bank
12X11
Row
13* 12*
256M
Col
4-bank
13X11
Row
13* 12* 26 25 24 23 22 21 20 19 18
64M
Col
2-bank
13X10
Row
12* 23
64M
Col
4-bank
12X10
Row
13* 12*
64M
Col
4-bank
12X9
Row
13* 12*
256M
Col
4-bank
13X10
Row
13* 12* 26 25 24 23 22 21 20 19 18
256M
Col
4-bank
13X9
Row
13* 12* 26 25 24 23 22 21 20 19 18
256M
Col
4-bank
13X8
Row
13* 12* 23 25 24 11 22 21 20 19 18
256M
Col
4-bank
12X9
Row
13* 12*
256M
Col
4-bank
12X10
Row
13* 12*
8
7
6
5
10 9
8
11 24 23 22 21 20 19 18
11 10 9
8
12* 13 23 22 21 20 19 18
24 11 10 9
8
12* 13 23 22 21 20 19 18
27
26 11 10 9
8
25 24 23 22 21 20 19 18
28
27 11 10 9
8
26 11 10 9
8
25 24 13 22 21 20 19 18
26 11 10 9
8
25 24 23 22 21 20 19 18
11 10 9
8
25 24 23 22 21 20 19 18
27 11 10 9
8
11 10 9
8
10 9
8
11 10 9
8
25 24 23 22 21 20 19 18
26 11 10 9
8
25 24 23 22 21 20 19 18
2-6
4
3
2
1
0
Row
Size
in MB/
Index
Value
7
6
5
4
3
32/0
17 16 15
14
7
6
5
4
3
16/1
17 16 15
14
7
6
5
4
3
32/2
17 16 15 14
7
6
5
4
3
256/3
17 16 15
14
7
6
5
4
3
512/4
17 16 15
14
7
6
5
4
3
128/5
17 16 15
14
7
6
5
4
3
128/6
17 16 15
14
7
6
5
4
3
64/7
17 16 15
14
7
6
5
4
3
256/8
17 16 15
14
7
6
5
4
3
128/9
17 16 15
14
7
6
5
4
3
64/10
17 16 15
14
7
6
5
4
3
64/11
17 16 15
14
7
6
5
4
3
128/12
17 16 15
14
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