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PM73121 Datasheet(PDF) 74 Page - PMC-Sierra, Inc

Part # PM73121
Description  AAL1 Segmentation And Reassembly Processor
PDF  223 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM73121 Datasheet(HTML) 74 Page - PMC-Sierra, Inc

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PM73121 AAL1gator II
PMC-Sierra, Inc.
PMC-980620
,VVXH
AAL1 SAR Processor
Data Sheet
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Figure 41 shows the contents of the receive data buffer for lines in the UDF-ML or UDF-HS
mode, including T1 unstructured mode. In unstructured modes, each frame buffer contains 256
bits. In the case of unstructured T1, each frame of T1 data consists of 192 bits. Therefore, each
frame buffer contains 1.33 frames of T1 data. This must be considered when determining CDVT
numbers.
Figure 42 shows the contents of the receive signaling buffer with an ESF-formatted T1 line in the
SDF-MF mode. Even channel bytes are stored in the low-byte end of the data words.
Figure 41.
Unstructured Format of the R_DATA_BUFFER
Figure 42.
T1 ESF SDF-MF Format of the R_SIG_BUFFER
255
0
Data Bits
0
256 bits
511
256 bits
256 bits
256 bits
1
2
Frame Buffer Number
Multiframe
0
1
2
3
15
Channel 0
ABCD
Channel 1
ABCD
Channel 23
ABCD
Channel 22
ABCD
Channel 24
Not Used
Channel 31
Not Used
Byte Address
0
31



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