PM5364 pmc-sierra, PM5364 Datasheet - Page 124
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PM5364
Manufacturer Part Number
PM5364
Description
Tupp 2488 Assp Telecom Standard
Manufacturer
pmc-sierra
Datasheet
1.PM5364.pdf
(306 pages)
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PM5364-BI
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Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2011334, Issue 7
Figure 26 Extended PSL Multiframe Alignment State Diagram
When the MFAS state machine is not in OOM state, bit 12 to bit 19 in the 32 bit sequence are
extracted as the extended PSL which is then stored in the State RAM. Similar to the 3-bit PSL,
the 8-bit extended PSL is processed by the ITU-T algorithm to determine the PSLM, PSLU and
PDIV alarm status. In G.707 specification, extended PSL value “00” to “07” is reserved to give
a unique name to the non-extended PSL signal label. The ITU-T algorithm will process the
value “00” to “07” from extended PSL as they are non-extended PSL.
In both Telcordia and ITU-T mode, when PSLMPERSIST is set to high, the assertion of UNEQ
status will clear the PSLMV status.
In summary, the Telcordia algorithm has three separate state machines that keep tracks of the
PSLM, UNEQ and PDIV states. The algorithm filters the received PSL to generate mismatch,
unequipped and pdi defect first, then updates the corresponding state machines.
The ITU-T algorithm has two state machines that keep tracks of accepted PSL and PSLU. The
ITU-T algorithm debounce the received PSL and store the value in accepted PSL first, then the
algorithm filters the accepted PSL to generate the PSLM, UNEQ and PDIV status. The PSLU
state machine is updated by comparing the current and previous received PSL.
MFAS Incorrect
ONE_MFRAM
E_ERROR
MFAS Incorrect
MFAS Incorrect
MFAS Correct
OOMFRAME
TUPP™ 2488 ASSP Telecom Standard Product Data Sheet
MFAS Correct
IN_MFRAME
MFAS Correct
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