S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Register 0x102: RCAS Indirect Link Data Register
Bit
15:10
9
Type
R
R/W
R/W
Function
Unused
VLDLBEN
PROV
Default
X
0
0
8
7:2
1:0
Unused
VLINK[1:0]
X
00
R/W
The RCAS Timeslot Provision RAM maps either timeslots from a physical link or an entire
physical link to a Virtual Link. It also provisions timeslots/links and enables Diagnostic
Loopback.
This register contains either: (1) the data read from the RCAS Timeslot Provision RAM after an
indirect read operation or (2) the data to be inserted into the RCAS Timeslot Provision RAM
during an indirect write operation.
VLINK[1:0]
VLINK[1:0] is the Virtual Link to which this RCAS LINK/TSLOT is mapped. Valid values
are 0x0 to 0x3. For proper operation, timeslots from multiple physical links cannot be
mapped to the same VLINK.
After an indirect read operation has been completed, VLINK[1:0] reports the virtual link
number read from the RCAS Timeslot Provision RAM. The Virtual Link number to be
written to the RCAS Timeslot Provision RAM in an indirect write operation must be set up
in this register before triggering the write. VLINK[1:0] reflects the value written until the
completion of a subsequent indirect read operation.
PROV
The indirect provision enable bit (PROV) reports the timeslot provision enable flag read
from the timeslot provision RAM after an indirect read operation has been completed. The
provision enable flag to be written to the timeslot provision RAM in an indirect write
operation must be set up in this register before triggering the write. When PROV is set high,
the current receive data byte is processed as part of the virtual link (as indicated
VLINK[1:0]). When PROV is set low, the current time-slot does not belong to any virtual
link and the receive data byte is ignored. PROV reflects the value written until the
completion of a subsequent indirect read operation.
VLDLBEN
When the indirect virtual link based diagnostic loopback enable bit VLDLBEN=1, the
current receive data byte will be over-written by a data byte retrieved from the loopback
FIFO of the Virtual Link as indicated by VLINK[1:0]. When VLDLBEN=0, the current
receive data byte is processed normally.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
137
PMC [ PMC-SIERRA, INC ]
