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PM73121 Datasheet(PDF) 85 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) 85 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 50 shows the channel-to-queue table operation.
3.7.1
Generation of TL_CLK
The Transmit Line Clock (TL_CLK) can be generated in four different ways. It can be sourced
externally when TL_CLK is an input. Or the AAL1gator II can generate it either by looping RL_
CLK, synthesizing a nominal T1 or E1 clock, or synthesizing an E1 or T1 clock based on received
SRTS values.
Figure 50.
Channel-to-Queue Table Operation
NOTES:
1.
RFTC fetches R_CH_TO_QUEUE entry for DS0s 6 and 7 for line 2.
2.
DS0 6 is being serviced by Queue MOD 32 = 10
Queue = line 2 x 32 + 10 = 74
DS0 7 is being serviced by Queue MOD 32 = 20
Queue = line 2 x 32 + 20 = 84
3.
RFTC fetches the queue status and write pointer for queue 74. The queue is not in underrun.
4.
RFTC fetches the queue status and write pointer for queue 84. The queue is in underrun.
5.
RFTC fetches the data for DS0 6 from the R_DATA_BUFFER.
6.
RFTC fetches the data for DS0 7 from R_COND_DATA.
64
74
84
20
10
R_DATA_BUFFER
RFTC
R_CH_TO_QUEUE
R_QUEUE_TBL
(Note 6)
(Note 5)
(Note 1)
(Note 2)
(Note 3)
(Note 4)
R_COND_DATA



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