IXP2400 Intel, IXP2400 Datasheet - Page 19

• Manufacturer Part Number: IXP2400
• Manufacturer: Intel

Specifications of IXP2400

• Operating Supply Voltage (typ): 1.3/1.5/2.5/3.3V
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Not Compliant

2.6
2.6.1
Datasheet
Table 2.
Table 3.
Note: External decoding may require external pipeline registers to account for the decode time,
signals than the number provided to accommodate the largest RAMs, so some address pins (23:20)
are configurable as either address- or port-enable based on CSR setting as shown in
that all of the SRAMs on a given channel must be the same size.
SRAM Controller Configurations
Each channel can be expanded by depth according to the number of port enables available. If
external decoding is used, then the number of SRAMs used is not limited by the number of port
enables generated by the SRAM controller.
depending on the desired frequency.
Maximum SRAM system sizes are shown in
because they use more port enables than the SRAM controller can supply directly.
Total Memory per Channel
Media and Switch Fabric Interface
PHY Modes Supported
The Media and Switch Fabric (MSF) Interface connects the IXP2400 to a physical layer device
(PHY) and/or a Switch Fabric Interface. MSF consists of the following external interfaces:
Configuration
•
SRAM Size
512K x 18
16M x 18
32M x 18
512K x 18
1M x 18
2M x 18
4M x 18
8M x 18
16M x 18
32M x 18
Receive and transmit interfaces, each of which can be individually configured for either
UTOPIA (Level 1, 2, and 3), POS-PHY (Level 2 and 3) or CSIX protocols.
1M x 18
2M x 18
4M x 18
8M x 18
SRAM
16 MB
32 MB
64 MB
SRAM Size
1 MB
2 MB
4 MB
8 MB
1
16 MB
32 MB
64 MB
1 MB
2 MB
4 MB
8 MB
16 MB
32 MB
64 MB
2 MB
4 MB
8 MB
NA
2
Addresses Needed to
Index SRAM
12 MB
24 MB
48 MB
3 MB
6 MB
NA
NA
3
17:0
18:0
19:0
20:0
21:0
22:0
23:0
Number of SRAMs on Channel
Table
16 MB
32 MB
64 MB
4 MB
8 MB
3. Shaded entries require external decoding,
NA
NA
4
Addresses Used
as Port Enables
Intel
23:22, 21:20
23:22, 21:20
23:22, 21:20
10 MB
20 MB
64 MB
5 MB
NA
NA
NA
23:22
23:22
None
None
5
®
IXP2400 Network Processor
12 MB
24 MB
6 MB
NA
NA
NA
NA
6
Select Pairs Available
Total Number of Port
14 MB
28 MB
7 MB
NA
NA
NA
NA
7
Table
4
4
4
3
3
2
1
2. Note
16 MB
32 MB
8 MB
NA
NA
NA
NA
8
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