
PRELIMINARY
XRT86SH221
144
REV. P1.0.5
SDH-TO-PDH FRAMER/MAPPER WITH INTEGRATED 21-CHANNEL E1 SH LIU
BIT [7:0] - SF_SET_THRESHOLD - LSB
These READ/WRITE bits, along the contents of the Receive STM-0/STM-1 Transport - SF SET Threshold - Byte 1
registers are used to specify the number of B2 byte errors that will cause the Receive STM-0/STM-1 TOH Processor
block to declare the SF (Signal Failure) Defect condition.
When the Receive STM-0/STM-1 TOH Processor block is checking for declaring the SF defect condition, it will
accumulate B2 byte errors throughout the SF Defect Monitoring Period. If the number of accumulated B2 byte errors
exceeds that which has been programmed into this and the Receive STM-0 Transport SF SET Threshold - Byte 1
register, then the Receive STM-0/STM-1 TOH Processor block will declare the SF defect condition.
BIT [7:0] - SF_CLEAR_THRESHOLD - MSB
These READ/WRITE bits, along the contents of the Receive STM-0 Transport - SF CLEAR Threshold - Byte 0 registers
are used to specify the upper limit for the number of B2 bit errors that will cause the Receive STM-0 TOH Processor
block to clear the SF (Signal Failure) defect condition.
When the Receive STM-0 TOH Processor block is checking for clearing the SF defect condition, it will accumulate B2
byte errors throughout the SF Defect Clearance Monitoring Period. If the number of accumulated B2 byte errors is less
than that programmed into this and the Receive STM-0 Transport SF CLEAR Threshold - Byte 0 register, then the
Receive STM-0 TOH Processor block clear the SF defect condition.
BIT [7:0] - SF_CLEAR_THRESHOLD - LSB
These READ/WRITE bits, along the contents of the Receive STM-0 Transport - SF CLEAR Threshold - Byte 1 registers
are used to specify the upper limit for the number of B2 bit errors that will cause the Receive STM-0 TOH Processor
block to clear the SF (Signal Failure) defect condition.
When the Receive STM-0 TOH Processor block is checking for clearing the SF defect condition, it will accumulate B2
byte errors throughout the SF Defect Clearance Monitoring Period. If the number of accumulated B2 byte errors is less
than that programmed into this and the Receive STM-0 Transport SF CLEAR Threshold - Byte 1 register, then the
Receive STM-0 TOH Processor block will clear the SF defect condition.
T
ABLE
82: R
ECEIVE
STM-0/STM-1 T
RANSPORT
- R
ECEIVE
SF SET T
HRESHOLD
0 (RSFST0 = 0
X
0237)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SF_SET_THRESHOLD[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
1
1
1
1
1
T
ABLE
83: R
ECEIVE
STM-0 T
RANSPORT
- R
ECEIVE
SF CLEAR T
HRESHOLD
2 (RSFCT2= 0
X
023A)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SF_CLEAR_THRESHOLD[15:8]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
1
1
1
1
1
T
ABLE
84: R
ECEIVE
STM-0 T
RANSPORT
- R
ECEIVE
SF CLEAR T
HRESHOLD
1 (RSFCT1 = 0
X
023B)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SF_CLEAR_THRESHOLD[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
1
1
1
1
1