
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
408
Register 20D0H: R8TD Control and Status
Bit
Type
Function
Default
Bit 15
R/W
RESERVED
0
Bit 14
R/W
RESERVED
0
Bit 13
Unused
X
Bit 12
Unused
X
Bit 11
Unused
X
Bit 10
Unused
X
Bit 9
R/W
PININV
0
Bit 8
R/W
OFAAIS
0
Bit 7
R/W
FUOE
0
Bit 6
R/W
LCVE
0
Bit 5
R/W
OFAE
0
Bit 4
R/W
OCAE
0
Bit 3
R
OFAV
X
Bit 2
R
OCAV
X
Bit 1
R/W
FOFA
0
Bit 0
R/W
FOCA
0
FOCA
The force out-of-character-alignment bit (FOCA) controls the operation of the character
alignment circuit on a serial link. A transition from logic zero to logic one in this bit forces
the receiver to the out-of-character-alignment state where it will search for the transport
frame alignment character (K28.5). This bit must be manually set to logic zero before it can
be used again.
FOFA
The force out-of-frame-alignment bit (FOFA) controls the operation of the frame alignment
circuit. A transition from logic zero to logic one in this bit forces the receiver to the out-of-
frame-alignment state where it will search for the transport frame alignment character
(K28.5). This bit must be manually set to logic zero before it can be used again.
OCAV
The out-of-character-alignment status bit (OCAV) reports the state of the character
alignment circuit. OCAV is set high when the receiver is in the out-of-character-alignment
state. OCAV is set low when the receiver is in the in-character-alignment state.