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參數(shù)資料
| 型號： | XRT83SL314IB-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 15/83頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU SH T1/E1/J1 14CH 304TBGA |
| 標準包裝： | 27 |
| 類型： | 線路接口裝置（LIU） |
| 驅(qū)動器/接收器數(shù)： | 14/14 |
| 規(guī)程： | T1，E1，J1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 304-LBGA |
| 供應(yīng)商設(shè)備封裝： | 304-TBGA（31x31） |
| 包裝： | 托盤 |
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XRT83SL314
xr
REV. 1.0.1
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
19
2.4
Equalizer Attenuation Flag
The ability to detect the amount of cable loss on the receiver inputs is enhanced by having the ability to
generate an interrupt by programming a pre-determined value for cable loss into the EQFLAG[5:0] global
register. This is particularly useful in applications where it is necessary for the LIU to generate an interrupt for
a cable loss which is lower than the declaration of the RLOS feature (see the RLOS section in this datasheet).
If the contents of the EQFLAG[5:0] register bits are equal to or less than the contents in the cable loss indicator
bits CLOS[5:0] for a given channel, an interrupt will be generated (if enabled in the appropriate channel register
and GIE is to "1"). Using the same example in Figure 7, a simplified block diagram of the equalizer flag is
shown in Figure 8.
FIGURE 8. SIMPLIFIED BLOCK DIAGRAM OF THE EQUALIZER ATTENUATION FLAG
2.5
Peak Detector and Slicer
The peak detector provides feedback to the equalizer control circuit until the amplitude of the incoming signal is
at an appropriate level. Once this level is obtained, the slicer identifies the incoming signal as a "1" and passes
the raw data to the clock and data recovery circuit. The slicer threshold is selected by programming SL[1:0] in
the appropriate global register. Selecting the slicer level is shown in Table 4.
TABLE 4: SELECTING THE SLICER LEVEL FOR THE PEAK DETECTOR
SL[1:0]
SLICER LEVEL
0h (00)
50%
1h (01)
45%
2h (10)
55%
3h (11)
68%
XRT83SL314
-15dB of Cable
Loss
Equalizer and
Peak Detector
CLOS[5:0] = 0x0Fh
EQFLAG[5:0] = 0x0Fh
Programmable
If (CLOS = EQFLAG)
Generate an Interrupt
Receiver Inputs
RTIP/RRING
Read Only
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| XRT83VSH28IB | IC LIU SH E1 OCTAL 225BGA |
| XRT83VSH314IB-F | IC LIU SH T1/E1/J1 14CH 304TBGA |
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| XRT83SL34 | 制造商:EXAR 制造商全稱:EXAR 功能描述:QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
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| XRT83SL38 | 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
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