PM73121ꢀAAL1gator II
Data Sheet
PMC-Sierra, Inc.
PMC-980620
,VVXHꢀꢁ
AAL1 SAR Processor
7.8.6 R_CH_TO_QUEUE_TBL
Organization: 128 words (8 lines × 32 DS0s)
Base address: 08200h
Index: 1h
Type: Read/Write
Function: This table associates the DS0 with the queue. It allows the transmit line inter-
face to determine the status of the receive queue supplying bytes for the DS0s being
processed. Initialize to the proper values. The AAL1gator II processes two bytes at a
time, so the values in the following table are in pairs. For unstructured lines, set all of
the queue values to the receive queue number mod 32. In UDF-HS mode, this table is
not used. When this queue is in underrun, the AAL1gator II reads data for the line
from the first word of the R_COND_DATA_0 table (refer to section 7.8.8 “R_
COND_DATA” on page 151).
Format: Refer to the following table.
Offset
Name
Description
N
CH_TO_QUEUE
Queue numbers and condition bits associated with this pair of
channels where:
Line = N ÷ 16.
Low channel = (N mod 16) × 2.
High channel = (N mod 16) × 2 + 1.
CH_TO_QUEUE Word Format
Field (Bits)
Description
RX_COND_H
(15:14)
Determines the type of data to be played out:
NOTE: Options “00”, “01”, and “11” are executed only when the
queue is in an underrun or resume state.
00 When the queue is in underrun, read signaling for this channel
from multiframe 0 and the data for this channel from the R_
COND_DATA table (refer to section 7.8.8 “R_COND_
DATA” on page 151).
01 When the queue is in underrun, read signaling for this channel
from multiframe 0 and play out pseudorandom data, which is
inserted data from R_COND_DATA, with the MSB con-
trolled by the pseudorandom number algorithm x18 + x7 + 1
(not valid for UDF-HS).
10 Read signaling for this channel from the R_COND_SIG table
(refer to section 7.8.7 “R_COND_SIG” on page 150) and the
data for this channel from the R_COND_DATA table.
11 When the queue is in underrun, read the signaling from multi-
frame 0 and play out the contents of the buffer.
Not used
(13)
Write with a 0 to maintain future software compatibility.
ꢀꢃꢇ
PMC [ PMC-SIERRA, INC ]
