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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
97
Register 0x22: TLOP Transmit K1
Bit Type Function Default
Bit 7 R/W K1[7] 0
Bit 6 R/W K1[6] 0
Bit 5 R/W K1[5] 0
Bit 4 R/W K1[4] 0
Bit 3 R/W K1[3] 0
Bit 2 R/W K1[2] 0
Bit 1 R/W K1[1] 0
Bit 0 R/W K1[0] 0
K1[7:0]:
The K1[7:0] bits contain the value inserted in the K1 byte when the APSREG
bit in the TLOP Control Register is a logic one. K1[7] is the most significant
bit, corresponding to the first bit (bit 1) transmitted. K1[0] is the least
significant bit, corresponding to the last bit (bit 8) transmitted. The bits in this
register are double buffered so that register writes do not need to be
synchronized to SONET/SDH frame boundaries. The insertion of a new APS
code value is initiated by a write to this register. The contents of this register,
and the TLOP Transmit K2 Register are inserted in the transmit stream
starting at the next frame boundary. Successive writes to this register must
be spaced at least two frames (250 µs) apart.