MCF5270 FREESCALE [Freescale Semiconductor, Inc], MCF5270 Datasheet - Page 22

• Manufacturer Part Number: MCF5270
• Description: 32-bit Embedded Controller Division
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Design Recommendations
The following tables provide a more comprehensive, step-by-step way to determine the correct address
line connections for interfacing the MCF5271 to SDRAM. To use the tables, find the one that corresponds
to the number of column address lines on the SDRAM and to the port size as seen by the MCF5271, which
is not necessarily the SDRAM port size. For example, if two 1M x 16-bit SDRAMs together form a
2M x 32-bit memory, the port size is 32 bits. Most SDRAMs likely have fewer address lines than are
shown in the tables, so follow only the connections shown until all SDRAM address lines are connected.
22
MCF5271
Pins
Row
Column
SDRAM
Pins
MCF5271
Pins
Row
Column
SDRAM
Pins
MCF5271
Pins
Row
Column
SDRAM
Pins
Table 8. MCF5271MCF5271 to SDRAM Interface (8-Bit Port,11-Column Address Lines)
Table 7. MCF5271MCF5271 to SDRAM Interface (8-Bit Port,10-Column Address Lines)
A17 A16 A15 A14 A13 A12 A11 A10 A9 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31
A17 A16 A15 A14 A13 A12 A11 A10 A9 A19 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31
A17 A16 A15 A14 A13 A12 A11 A10 A9 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22
17
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21
17
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20
17 16 15 14 13 12 11 10
0
0
0
Table 6. MCF5271 to SDRAM Interface (8-Bit Port, 9-Column Address Lines)
16
16
Address Pin Row Address Column Address
1
1
1
15
15
21
22
23
24
25
2
2
2
MCF5271 Integrated Microprocessor Hardware Specification, Rev. 1.2
14
14
3
3
3
Table 5. Generic Address Multiplexing Scheme (continued)
13
13
4
4
4
12
12
5
5
5
21
22
23
24
25
11
11
6
6
6
10
10
7
7
7
9
8
9
8
9
8
18 19 20 21 22 23 24 25 26 27 28 29 30 31
20
21
22
23
24
19
18
19
18
20
20
21
21
22
22 23 24 25 26
23 24 25 26 27
Notes Related to Port Sizes
27 28
28 29
Freescale Semiconductor
29
30
30
31
31