XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 106

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT84L38
OCTAL T1/E1/J1 FRAMER
B
IT
N
5-3
2-0
UMBER
Framing Error Tolerance
Framing Bit Range
B
IT
N
AME
B
IT
R/W
R/W
T
YPE
Framing Error Tolerance:
These READ/WRITE bit-fields together with the Range bits form
the criteria for Loss of Frame Alignment.
In SF mode, a Loss of Frame Alignment is typically declared if
two out of four Terminal Framing bits (Ft) or Signaling Framing
bits (Fs) are incorrect. Therefore, the Tolerance bits are normally
set to two and the Range bits are normally set to four.
In ESF mode, a Loss of Frame Alignment is typically declared if
two out of four Framing Pattern Sequence bits (FPS) are incor-
rect. Therefore, the Tolerance bits are normally set to two and
the Range bits are normally set to four.
In N mode, a Loss of Frame Alignment is typically declared if two
out of four Terminal Framing bits (Ft) are incorrect. Therefore,
the Tolerance bits are normally set to two and the Range bits are
normally set to four.
In SLC 96 mode, a Loss of Frame Alignment is typically
declared if two out of four Terminal Framing bits (Ft) are incor-
rect. Therefore, the Tolerance bits are normally set to two and
the Range bits are normally set to four.
In T1DM mode, a Loss of Frame Alignment is typically declared
if TOLR out of RANG bits are incorrect. Therefore, the Tolerance
bits are normally set to two and the Range bits are normally set
to four.
Framing Bit Range:
These READ/WRITE bit-fields together with the Tolerance bits
form the criteria for Loss of Frame Alignment.
In SF mode, a Loss of Frame Alignment is typically declared if
two out of four Terminal Framing bits (Ft) or Signaling Framing
bits (Fs) are incorrect. Therefore, the Tolerance bits are normally
set to two and the Range bits are normally set to four.
In ESF mode, a Loss of Frame Alignment is typically declared if
two out of four Framing Pattern Sequence bits (FPS) are incor-
rect. Therefore, the Tolerance bits are normally set to two and
the Range bits are normally set to four.
In N mode, a Loss of Frame Alignment is typically declared if two
out of four Terminal Framing bits (Ft) are incorrect. Therefore,
the Tolerance bits are normally set to two and the Range bits are
normally set to four.
In SLC 96 mode, a Loss of Frame Alignment is typically
declared if two out of four Terminal Framing bits (Ft) are incor-
rect. Therefore, the Tolerance bits are normally set to two and
the Range bits are normally set to four.
In T1DM mode, a Loss of Frame Alignment is typically declared
if TOLR out of RANG bits are incorrect. Therefore, the Tolerance
bits are normally set to two and the Range bits are normally set
to four.
86
B
IT
D
ESCRIPTION
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