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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_STATE_1 Word Format
NOTE: This word is read-only and is maintained by the RALP.
R_LINE_STATE Word Format
NOTE: This word is read-only after initialization and is maintained by the RALP and
RFTC.
R_CDVT
(7:0)
Receive Cell Delay Variation Tolerance (R_CDVT) is a constant and is
programmed by the microprocessor during initialization. It is used by the
RFTC after the receipt of the first cell after an underrun. In T1 SDF-MF, E1_
WITH_T1_SIG, or SDF-FR mode, the R_CDVT is expressed as the number
of multiframes in bits 7:5 and the number of frames in bits 4:0. In E1 and all
other T1 modes, R_CDVT is the number of frames. In unstructured
applications, the number of frames refers to the number of 256-bit increments.
For T1 unstructured modes, this is equivalent to the number of 165.8
μ
s
periods.
Field (Bits)
Description
Reserved (FRC_UNDRN)
(15)
Initialize to 0 to maintain future software compatibility.
Reserved (SNCRCST)
(14)
Initialize to 0 to maintain future software compatibility.
Reserved (PTRMMST)
(13)
Initialize to 0 to maintain future software compatibility.
Reserved (FNDPTR)
(12)
Initialize to 0 to maintain future software compatibility.
Reserved (FNDFRSTPTR)
(11)
Initialize to 0 to maintain future software compatibility.
Not used
(10:9)
Driven with a 0. Mask on reads to maintain future software compatibility.
R_WRITE_PTR
(8:0)
Pointer to the frame to which the cell receiver is writing.
Field (Bits)
Description
R_UNDERRUN
(15)
Indicates that this queue is currently in underrun. Initialize to 1. Not used
in UDF-HS mode.
R_RESUME
(14)
Indicates that this queue is currently in resume state. Initialize to 0. Not
used in UDF-HS mode.
R_SIG_RESUME
(13)
Indicates that this queue is currently in signal resume state. Initialize to 0.
Not used in UDF-HS mode.
Field (Bits)
Description