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S/UNI-QUAD
PMC-Sierra, Inc.
PM5349 S/UNI-QUAD
DATASHEET
PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
85
Register 0x14: TSOP Control
Bit Type Function Default
Bit 7 Unused X
Bit 6 R/W DS 0
Bit 5 R/W Reserved 0
Bit 4 R/W Reserved 0
Bit 3 R/W Reserved 0
Bit 2 R/W Reserved 0
Bit 1 R/W Reserved 0
Bit 0 R/W LAIS 0
LAIS:
The LAIS bit controls the insertion of line alarm indication signal (AIS). When
LAIS is set to logic one, the TSOP inserts AIS into the transmit SONET/SDH
stream. Activation or deactivation of line AIS insertion is synchronized to
frame boundaries. Line AIS insertion results in all bits of the SONET/SDH
frame being set to one prior to scrambling except for the section overhead.
DS:
The DS bit is set to logic one to disable the scrambling of the STS-3c (STM-1)
stream. When DS is a logic zero, scrambling is enabled.
Reserved:
The reserved bits must be programmed to logic zero for proper operation.