PM73121ꢀAAL1gator II
Data Sheet
PMC-Sierra, Inc.
PMC-980620
,VVXHꢀꢁ
AAL1 SAR Processor
Figure 50 shows the channel-to-queue table operation.
R_CH_TO_QUEUE
20
10
R_QUEUE_TBL
(Note 2)
RFTC
(Note 3)
(Note 4)
64
74
84
(Note 1)
R_DATA_BUFFER
(Note 5)
R_COND_DATA
(Note 6)
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.
Figure 50. 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.
ꢅꢇ
PMC [ PMC-SIERRA, INC ]
