參數(shù)資料
型號： XRT72L73
廠商： Exar Corporation
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù)： 82/105頁
文件大?。?/td> 1307K
代理商： XRT72L73
XRT72L73
THREE CHANNEL, DS3 ATM UNI/CLEAR-CHANNEL FRAMER IC
REV. P1.0.1
á
PRELIMINARY
82
T
ABLE
78:
R
X
CP A
DDITIONAL
C
ONFIGURATION
R
EGISTER
R
EGISTER
77 R
X
CP A
DDITIONAL
C
ONFIGURATION
R
EGISTER
H
EX
A
DDRESS
: 0
X
4D
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7
Rx OAM FIFO Enable
R/W
0
0: The Receive OAM Cell Buffer functions as one cell (54 byte) buffer
1: The Receive OAM Cell Buffer functions as two-54-byte buffers.
N
OTE
:
This bit-field is only active if the XRT72L73 is operating in the “ATM
UNI” Mode.
6
Rx CRC10 Enable
R/W
0
0: CRC-10 Verification is NOT performed on received OAM cells.
1: CRC-10 Verification is performed on received OAM cells.
N
OTE
:
This bit-field is only active if the XRT72L73 is operating in the “ATM
UNI” Mode.
5
User Cell Filter Discard
R/W
0
0: Incoming cells with header bytes matching the “User Cell Filtering” criteria
are written to the RxFIFO (all remaining cells are discarded).
1: Incoming cells with header bytes NOT matching the “User Cell Filtering”
criteria are discarded (all remaining cells are written to RxFIFO)
N
OTES
:
1. This bit-field is only active if the XRT72L73 is operating in the “ATM
UNI” Mode.
2. This bit-field is only active of the “User Cell Filter” is enabled.
4
User Cell Filter Enable
R/W
0
0: User cell filter is disabled. All user cells will be written to the RxFIFO.
1: User cell filter is enabled.
N
OTE
:
This bit-field is only active if the XRT72L73 is operating in the “ATM
UNI” Mode.
3
Correction Thresh(1)
R/W
1
These two bits permit the user to specify the Correction Threshold that the
Receive Cell Processor will use, during HEC Byte Verification.
00: Sets Correction Threshold to “0”.
01: Sets Correction Threshold to “1”.
10: Sets Correction Threshold to “3”.
11: Sets Correction Threshold to “7”.
N
OTE
:
This bit-field is only active if the XRT72L73 is operating in the “ATM
UNI” Mode.
2
Correction Thresh(0)
R/W
1
1
Correction Enable
R/W
1
0: Disables header error correction.
1: Enables header error correction algorithm.
N
OTE
:
This bit-field is only active if the XRT72L73 is operating in the “ATM
UNI” Mode.
0
OAM Pass Through
R/W
0
0: OAM cells are subject to the Idle Cell and User Cell Filtering criteria.
1: OAM cells are NOT subject to the Idle Cell and User Cell Filtering criteria.
N
OTE
:
This bit-field is only active if the XRT72L73 is operating in the
“ATM UNI” Mode.
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