RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
Field (Bits)
Description
E1_WITH_T1_SIG
(12)
Enables T1 signaling while in E1 mode for this line.
Signaling is updated every 24 frames instead of every
16 frames. This bit is valid only when the line is in E1
SDF-MF mode. AAL1 cell structures contain a signaling
nibble every 25 bytes instead of every 17 bytes per
single DS0.
1
0
Use T1 signaling.
Use E1 signaling.
HI_RES_SYNTH
(11)
When this bit is set the clock synthesizer for this line is
in high resolution mode. In high resolution mode the
synthesizer has 256 distinct frequencies to use when
recovering an E1 or T1 clock. When high resolution
mode is disabled the synthesizer has 16 distinct
frequencies. This bit should be set for adaptive clocking
and must be off for SRTS.
Reserved
(10)
Reserved
MF_ALIGN_EN
(9)
When operating in SDF-MF mode, MF_ALIGN_MODE
controls the MF alignment options:
0) only the CDVT value is taken into account when
determining when to play out data. Normally this mode
is used
1) MF_ALIGN_EN, The CDVT and the multiframe
boundaries are taken into account, the data is aligned
with the next MF boundary after CDVT.
SHIFT_CAS
(8)
Causes the CAS nibble to be shifted so as to be
coincident with the upper nibble of data instead of with
the lower nibble of data.
0) CAS nibble is coincident with the lower nibble of data
1) CAS nibble is coincident with the upper nibble of data
GEN_SYNC
(7)
Enables the AAL1gator to generate TL_SYNC instead of
receiving it as an input. Only valid in Direct Low Speed
mode.
1) TL_SYNC is an output for this line
0) TL_SYNC is an input for this line
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL
177
PMC [ PMC-SIERRA, INC ]
