cn8236 Mindspeed Technologies, cn8236 Datasheet - Page 103

• Manufacturer Part Number: cn8236
• Description: Atm Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

CN8236
ATM ServiceSAR Plus with xBR Traffic Management
4.3.5 Routing Tags
Figure 4-7. Route Tag Table for tag_size = 1 through 4
28236-DSH-001-B
SEG_TAGBASE(SEG_TAGB)
SEG_VCC_INDEX
Based upon the setting of CONFIG1(TAG_SIZE) field, routing tags need to be
prepended to the cell written into the TXFIFO.
routing tag tables and position in TXFIFO. The segmentation block writes either
4, 8, or 12 bytes into the TXFIFO, depending upon the size of tag required. The
UTOPIA block strips off the appropriate number of bytes to form the desired size
cell.
UTOPIA cell.
NOTE:
Table 4-18. Maximum TxFIFO Size with Routing Tags
TXFIFO
Tag Size
Table 4-19
The maximum TxFIFO size becomes reduced when using routing tags.
10
11
5
6
7
8
9
Mindspeed Technologies
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is a cross-reference between the routing tag table and the
b0
b0
h0
(maximum number of cells)
b1
b1
h1
TxFIFO
b2
b2
h2
8
7
b3
h3
b3
™
0
4.3 Segmentation Control and Data Structures
h = atm header
Figures 4-7
4.0 Segmentation Coprocessor
through
4-9
show the
8236_017
4-25