參數(shù)資料
型號: XRT83SL28
廠商: Exar Corporation
英文描述: 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: 8路E1短途線路接口單元
文件頁數(shù): 22/47頁
文件大?。?/td> 377K
代理商: XRT83SL28
XRT83SL28
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
xr
REV. 1.0.0
20
2.0
TRANSMIT PATH LINE INTERFACE
The transmit path of the XRT83SL28 LIU consists of 8 independent E1 transmitters. The following section
describes the complete transmit path from TCLK/TPOS/TNEG inputs to TTIP/TRING outputs. A simplified
block diagram of the transmit path is shown in Figure 12.
2.1
In dual rail mode, TPOS and TNEG are the digital inputs for the transmit path. In single rail mode, TNEG can
be tied to ground unless Hardware mode is selected (see the Hardware Pin Description). The XRT83SL28 can
be programmed to sample the inputs on either edge of TCLK. By default, data is sampled on the falling edge of
TCLK. To sample data on the rising edge of TCLK, set TCLKinv to "1" in the appropriate global register.
Figure 13 is a timing diagram of the transmit input data sampled on the falling edge of TCLK. Figure 14 is a
timing diagram of the transmit input data sampled on the rising edge of TCLK. The timing specifications are
shown in Table 3.
F
IGURE
13. T
RANSMIT
D
ATA
S
AMPLED
ON
F
ALLING
E
DGE
OF
TCLK
TCLK/TPOS/TNEG Digital Inputs
F
IGURE
14. T
RANSMIT
D
ATA
S
AMPLED
ON
R
ISING
E
DGE
OF
TCLK
F
IGURE
12. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
T
RANSMIT
P
ATH
HDB3
Encoder
Tx Jitter
Attenuator
Timing
Control
Tx Pulse Shaper
Line Driver
TTIP
TRING
TCLK
TPOS
TNEG
TCLK
TPOS
or
TNEG
TCLK
R
TCLK
F
T
HO
T
SU
TCLK
TPOS
or
TNEG
TCLK
F
TCLK
R
T
HO
T
SU
相關PDF資料
PDF描述
XRT83SL28IV 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83SL30 SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
XRT83SL30IV SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
XRT83VSH28 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH28IB 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
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