參數(shù)資料
型號(hào): XRT72L74
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): 50/104頁
文件大小: 1301K
代理商: XRT72L74
XRT72L74
FOUR CHANNEL, DS3 ATM UNI/CLEAR-CHANNEL FRAMER
REV. P1.0.0
á
PRELIMINARY
50
T
ABLE
2: UNI I/O C
ONTROL
R
EGISTER
R
EGISTER
1 UNI I/O C
ONTROL
R
EGISTER
H
EX
A
DDRESS
:0
X
01
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7
Disable LOC
R/W
1
0: Internal loss of clock detection circuit enabled
1: Internal loss of clock detection circuit disabled
6
LOC
RO
0
0: Indicates no Loss of Clock
1: Indicates TxLnCLk or RxLineLck is not present. Bit is valid only if Disable LOC
is 0
5
INTERRUPT ENABLE
RESET
R/Q
1
0: Interrupt enable register bits are not reset by the chip when active interrupts
are read.
1: Reading of status of an active interrupt resets the corresponding interrupt
enable bit.
4
B3ZS*/AMI
R/W
0
0: B3ZS Encoding and Decoding is enabled.
1: B3ZS Encoding and Decoding are disabled.
N
OTE
:
Dual-Rail data must be selected (via bit 3 of this register) if B3ZS
Encoding/Decoding are enabled.
3
SINGLE-RAIL/DUAL-
RAIL
R/W
0
0: Dual-Rail data is transmitted and received between the XRT72L74 and the LIU
IC.
1: Single-Rail data is transmitted and received between the XRT72L74 and the
LIU IC.
2
Tx Clock Invert
R/W
0
0: Outputs on TxPOS, TxNEG are updated on rising edge of TxClk
1: Ouputs on TxPOS, TxNEG are updated on falling edge of TxClk
1
Rx Clock Invert
R/W
0
0: Inputs on RxPOS, RxNEG are sampled at rising edge of RxClk
1: Inputs on RxPOS, RxNEG are sampled at falling edge of RxClk
0
REFRAME
R/W
0
0 to 1 transition forces the Receive DS3 Framer block to start frame search
T
ABLE
3:
P
ART
N
UMBER
R
EGISTER
R
EGISTER
2 P
ART
N
UMBER
R
EGISTER
H
EX
A
DDRESS
: 0
X
02
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
7-0
Part Number
RO
0x04
Hex: 0x04 (0000 0100)
T
ABLE
4:
V
ERSION
N
UMBER
R
EGISTER
R
EGISTER
3 V
ERSION
N
UMBER
R
EGISTER
H
EX
A
DDRESS
: 0
X
03
B
IT
F
UNCTION
T
YPE
D
EFAULT
D
ESCRIPTION
-O
PERATION
0-7
Version Number
RO
0x01
Hex 0x04: (0000 0001)
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