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PMC-Sierra, Inc.
PM73121AAL1gator II
L
PMC-980620
,VVXH
AAL1 SAR Processor
Data Sheet
35235,(7$5<$1'&21),'(17,$/7230&6,(55$,1&$1')25,76&86720(56,17(51$/86(
R_TOT_LEFT Word Format
NOTE: This word is read-only and is maintained by RALP.
R_SN_CONFIG Word Format
This word is maintained by the microprocessor.
Reserved
(5:4)
Write with a 0 to maintain future software compatibility.
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.
1
)
+
2
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.
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:
00
b
Insert FF
h
.
01
b
Insert data from R_CONDQ_DATA.
10
b
Insert old data from receive buffer.
11
b
Insert data from R_CONDQ_DATA with the MSB controlled by
the pseudorandom number algorithm x
18
+ x
7
+ 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.
Field (Bits)
Description
R_DATA_LAST
-no. of DS0s
1
–
=