參數(shù)資料
型號(hào)： XRT72L74
廠商： Exar Corporation
元件分類(lèi)： 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(yè)數(shù)： 57/104頁(yè)
文件大?。?/td> 1301K
代理商： XRT72L74
á
XRT72L74
FOUR CHANNEL, DS3 ATM UNI/CLEAR-CHANNEL FRAMER
PRELIMINARY
REV. P1.0.0
57
T
ABLE
16:
R
X
DS3 S
TATUS
R
EGISTER
R
EGISTER
15 R
X
DS3 S
TATUS
R
EGISTER
H
EX
A
DDRESS
:0
X
0F
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7-5
Unused
RO
0
4
Rx FERF
RO
0
Receive FERF (Far-End Receive Failure) Alarm:
0: The Receive DS3 Framer block is NOT currently declaring the “FERF”
condition.
1: The Receive DS3 Framer block is currently declaring the “FERF” condi-
tion.
3
Rx AIC
RO
0
Receive AIC (Application Identification Channe) State:
0: Indicates that the AIC bit-field was set to “0” within two or more of the last
15 M-frames. This indicates that the inbound DS3 data stream is of the “M13
Framing” format.
1: Incoming frame is found to be in the C-bit format (AIC bit = 1) for at least
63 consecutive M-frames. This indicates that the inbound DS3 data stream
is of the “C-bit Parity” Framing format.
2
Rx FEBE(2)
RO
0
Received FEBE (Far-End-Block Error) Value:
RxFEBE[2:0] contains the value of the most recently received FEBE value.
When RxFEBE[2:0] = 011, this indicates that the Remote Terminal has
detected CP-bits or Framing Bit Errors in its DS3 data stream.
When RxFEBE[2:0] = 111, this indicates that the Remote Terminal is not cur-
rently detecting any Framing Bit or CP-bit errors in its DS3 data stream.
N
OTE
:
These bit-fields are only active if the XRT72L74 is configured to sup-
port the “C-bit Parity” Framing format.
1
RxFEBE(1)
RO
0
0
RxFEBE(0)
RO
0
T
ABLE
17:
R
X
DS3 I
NTERRUPT
E
NABLE
R
EGISTER
R
EGISTER
16 R
X
DS3 I
NTERRUPT
E
NABLE
R
EGISTER
H
EX
A
DDRESS
: 0
X
10
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7
CP Bit Error Interupt
Enable
R/W
0
0: Detection of CP-Bit Error Interrupt is disabled
1: Generates Interrupt upon Detection of CP (Path Parity) bit Error.
6
LOS Interrupt Enable
R/W
0
0: Change in LOS Condition Interrupt is disabled
1: Generates interrupt upon change of LOS (Loss of Signal) status
5
AIS Interrupt Enable
R/W
0
0: Change in AIS Condition Interrupt is disabled
1: Generates interrupt upon change of AIS (Alarm Indication Signal) status.
4
Idle Interrupt Enable
R/W
0
0: Change in Idle Condition Interrupt is disabled
1: Generates interrupt upon change of IDLE status
3
FERF Interrupt Enable
R/W
0
0: Change in FERF (Far-End Receive Failure) Condition Interrupt is disabled
1: Generates interrupt upon change in FERF Condition.
2
AIC Interrupt Enable
R/W
0
0: Change in AIC State Interrupt is disabled
1: Generates interrupt upon change of AIC values, in “inbound” DS3 data
steam.
1
OOF Interrupt Enable
R/W
0
0: Change in OOF (Out of Frame) Condition Interrupt is disabled
1: Generates interrupt upon change of OOF condition.
0
P-Bit Error Interrupt Enable
R/W
0
0: Detection of P-Bit Error Interrupt disabled
1: Generates interrupt upon Detection of P-bit Error.
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