MT92220BG Zarlink Semiconductor, MT92220BG Datasheet - Page 56

• Manufacturer Part Number: MT92220BG
• Description: Description = 1023 Channel Voice Over IP/AAL2 Processor ;; Package Type = Epbga ;; No. Of Pins = 608
• Manufacturer: Zarlink Semiconductor

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If the confirmation structure found does not match the desired headers or the packet fails the Flow Table look-up,
the structure may contain a pointer to the Next Post-Search Confirmation Structure and the matching process
begins again. If no match is found and the pointer to the next structure is null, then the packet is routed according to
the Default Profile Post-Search Structure routing for that profile. Because conflicts are resolved by the post-search
confirmation structures, no conflicts can occur in the binary tree, so every node value can only be present once in
the tree.
Each profile has a Default Post-Search Structure locating at a fixed address in SDRAM C. Any packet that didn’t
find a match in binary tree, or failed the verification in Post-Search Confirmation Structures, will find its way to
Default Post-Search Structure with its profile number. From there, the packet can be deleted, sent to CPU, or
re-entering the binary tree by using a new profile number (i.e. a new identification key).
The following table and figure show the location and format of Profile Default Post-Search Structures.
I0 - I255
Field
Profile number
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
Index 0 to 255 in the flow table. The base address of the Flow Table is pointed to
by the Flow Table Pointer. The Index is the IP Address Index from the
post-search confirmation structure. When ‘1’, the destination IP address of the
packet is valid to receive on this logical subnet. When ‘0’, it is invalid.
Table 17 - Profile Default Post-Search Structure
Table 16 - Fields and Description
Zarlink Semiconductor Inc.
Structure Address in SDRAM
Profile Default Post-Search
Description
1C00h
1C80h
1D00h
1D80h
1A00h
1A80h
1B00h
1B80h
1800h
1880h
1900h
1980h
1E00
1E80
1F00
1F80