PM73121ꢀAAL1gator II
Data Sheet
PMC-Sierra, Inc.
PMC-980620
,VVXHꢀꢁ
AAL1 SAR Processor
Field (Bits)
Description
Write with a 0 to maintain future software compatibility.
Reserved
(5:4)
R_DATA_LAST
(3:0)
Number of signaling bytes in the structure, minus one (for example, for an E1 SDF-MF
VC with six DS0s, R_DATA_LAST is set to 2). An E1-SDF-MF VC with seven DS0s is
set to 3 as one signaling nibble is unused. Not used in UDF-ML or UDF-HS mode.
(no. of DS0s + 1)
--------------------------------------------
R_DATA_LAST =
– 1
2
R_TOT_LEFT Word Format
NOTE: This word is read-only and is maintained by RALP.
Field (Bits)
Description
Not used
(15:10)
Driven with a 0. Mask on reads to maintain future software compatibility.
R_TOT_LEFT
(9:0)
Total bytes minus one remaining in the structure. Not used in UDF-ML or
UDF-HS mode.
R_SN_CONFIG Word Format
This word is maintained by the microprocessor.
Field (Bits)
Description
R_CONDQ_DATA
(15:8)
Value of conditioned data inserted into lost cells depending on the value of
INSERT_DATA.
Not used
(7)
Write with a 0 to maintain future software compatibility.
INSERT_DATA
(6:5)
Controls the format of the data inserted for lost cells:
00b Insert FFh.
01b Insert data from R_CONDQ_DATA.
10b Insert old data from receive buffer.
11b Insert data from R_CONDQ_DATA with the MSB controlled by
the pseudorandom number algorithm x18 + x7 + 1 (not valid for
UDF-HS).
DISABLE_SN
(4)
If set, sequence number processing is disabled. Statistics will still be kept
but no cells will be dropped due to SN errors.
ꢀꢅꢉ
PMC [ PMC-SIERRA, INC ]
