PM5364 pmc-sierra, PM5364 Datasheet - Page 237

• Manufacturer Part Number: PM5364
• Description: Tupp 2488 Assp Telecom Standard
• Manufacturer: pmc-sierra

13.18 System Egress Working Vs. Protect
13.19 Line Ingress Working Vs. Protect
13.20 Programmable I/O Operation
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2011334, Issue 7
In the System Egress, data can come from both working and protect sources. When operating
TUPP 2488, the user must chose between working and protect.
To do this, assert the SEWSEL input to select the working path for all lines on the system egress
if the SEWSEL_SRC register is high
is low, then the value in SEWSEL_VAL selects working (0) or protect (1).
All system side working protect changes are synchronized to the next frame boundary at the
working/protect boundaries.
In the Line Ingress data can come from both working and protect sources.
On the Line Ingress side, there are two options for working/protect selection. If the
LIWSEL_ EN register is set then LIWSEL operates in the same way as SEWSEL and overrides
the ingress STSI LIWTSEN bits. If the LIWSEL_EN register is cleared then the programmable
bits in the STSI are used. These are set per STS-1.
Taking STS-1 #1: if the programmable bit for this is cleared in the WORKING STSI
(LIWTSEN), then the working STS-1 #1 is passed through. To pass through protect links, assert
LIWTSEN. All line ingress working protect changes are synchronized to the frame boundary at
the working/protect location. Software (TSEN) settings occur on the frame boundary after
change. Hardware (LIWSEL) changes occur on the second frame boundary after change.
If using the parallel ingress inputs, then LINE_PARALLEL register is set high. In this case the
user should set the LIWSEL to working.
The Programmable I/O should be set to the required voltage values as per register 001Fh in the
master registers (2.2v or 3.3v). MPI_HV controls the MPIF data bus to 2.5v or 3.3v and
EGR_HV programs the Parallel Egress bus and the REFCLK input.
Pullups may also be enabled using EGR_PUEN and MPI_PUEN (these default to ON). Note
that there is no pullup option on REFCLK input.
o SIPROT2-SEPROT4
o SIPROT1-SEPROT3
o SIWORK6-SEWORK8
o SIWORK5-SEWORK7
o SIWORK2-SEWORK4
o SIWORK1-SEWORK3
. Must be stable at least two clocks before it is sampled.
TUPP™ 2488 ASSP Telecom Standard Product Data Sheet
If SEWSEL_SRC
Released
237