PM5342 SPECTRA-155
DATA SHEET
PMC-970133
ISSUE 4
SONET/SDH PAYLOAD EXTRACTOR/ALIGNER
Register EBH: SPECTRA-155 Trace Message Mode 2 Interrupt Status
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 5
Bit 4
Bit 3
Bit 0
Type
R/W
R/W
R/W
R/W
R
R
R
R
Function
PTIU2IE#3
PTIU2IE#2
PTIU2IE#1
STIU2IE
PTIU2I#3
PTIU2I#2
PTIU2I#1
STIU2I
Default
0
0
0
0
X
X
X
X
The SPECTRA-155 Trace Message Mode 2 Interrupt Status register indicates
section trace message (J0 byte) and path trace message (J1 byte) unstable
states changes when operating in mode 2.
STIU2I:
The section trace identifier message unstable mode 2 interrupt status bit is
set high when stable/unstable status of the section trace identifier framer
changes state. This bit and the interrupt are cleared when this register is
read.
PTIU2I#1, PTIU2I#2, PTIU2I#3:
The path trace identifier message unstable mode 2 interrupt status bit is set
high when stable/unstable status of the path trace identifier framer changes
state. This bit and the interrupt are cleared when this register is read.
STIU2IE:
The section trace identifier message unstable interrupt enable bit controls
the activation of the interrupt output when the receive section identifier
message state changes from stable to unstable and vice versa. The stable
state is entered when the same identifier byte is received for forty eight
consecutive SONET/SDH frames. The unstable state is entered when one or
more errors are detected in a sixteen byte window and three consecutive
sixteen byte windows are in error. When STIU2IE is set high, changes in the
receive section trace identifier message stable/unstable state will activate the
interrupt (INTB) output. When STIU2IE is set low, section trace identifier
state changes will not affect INTB.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
289
PMC [ PMC-SIERRA, INC ]
