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Intel
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IXP43X Product Line of Network Processors—Hardware Design Guidelines
Intel
®
IXP43X Product Line of Network Processors
HDG April 2007
74 Document Number: 316844; Revision: 001US
Table 25. Supported DDRI 32-bit SDRAM Configurations
DDR SDRAM
Technology
DDR SDRAM
Arrangement
# Banks
Address Size Leaf Select Total
Memory
Size
a
a. Table indicates 32-bit wide memory subsystem sizes.
Page
Size
b
b. Table indicates 32-bit wide memory page sizes.
Row Column DDR_BA[1] DDR_BA[0]
128 Mbit
c
c. Supported with DDR SDRAM only
16 M x 8
1
12 10 ADDR[26] ADDR[25]
64 M 4KB
2 128 M 4KB
8 M x 16
1
12 9 ADDR[25] ADDR[24]
32 M 2KB
2 64 M 2KB
256 Mbit
32 M x 8
1
13 10 ADDR[27] ADDR[26]
128 M 4KB
2 256 M 4KB
16 M x 16
1
13 9 ADDR[26] ADDR[25]
64 M 2KB
2 128 M 2KB
512 Mbit
64 M x 8
1
13 11 ADDR[28] ADDR[27]
256 M 8KB
2 512 M 8KB
32 M x 16
1
13 10 ADDR[27] ADDR[26]
128 M 4KB
2 256 M 4KB
1Gbit
c
128 M x 8
1
14 11 ADDR[29] ADDR[28]
512 M 8KB
2 1 G 8KB
64 M x 16
1
14 10 ADDR[28] ADDR[27]
256 M 4KB
2 512 M 4KB
Table 26. Supported DDRII 32-bit SDRAM Configurations
DDR SDRAM
Technology
DDR SDRAM
Arrangement
# of
Banks
Address Size Leaf Select
Total
Memory
Size
Page
Size
Row Column DDR_BA[1] DDR_BA[0]
256 Mbit
32M x 8
1
13 10 ADDR[27] ADDR[26]
128MB 4KB
2 256MB 4KB
16M x16
1
13 9 ADDR[26] ADDR[25]
64MB 2KB
2 128MB 2KB
512 Mbit
64M x 8
1
14 10 ADDR[28] ADDR[27]
256MB 4KB
2 512MB 4KB
32M x16
1
13 10 ADDR[27] ADDR[26]
128MB 4KB
2 256MB 4KB
Table 27. Supported DDRI 16-bit SDRAM Configurations
DDR SDRAM
Technology
DDR SDRAM
Arrangement
# of
Banks
Address Size Leaf Select
Total
Memory
Size
Page
Size
Row Column DDR_BA[1] DDR_BA[0]
128 Mbit 8M x16 1 12 9 ADDR[23] ADDR[22] 16MB 1KB