参数资料
| 型号： | XRT83SL38IB |
| 厂商： | Exar Corporation |
| 文件页数： | 38/88页 |
| 文件大小： | 0K |
| 描述： | IC LIU SH T1/E1/J1 OCTAL 225BGA |
| 标准包装： | 84 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 8/8 |
| 规程： | T1，E1，J1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 225-BGA |
| 供应商设备封装： | 225-BGA（19x19） |
| 包装： | 托盘 |
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XRT83SL38
41
REV. 1.0.2
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
Network Loop-Up Code. In this mode if the NLCD interrupt is enabled, the chip will initiate an interrupt on every
transition of NLCD. The host has the option to ignore the request from the remote terminal, or to respond to the
request and manually activate Remote Loop-Back. The host can subsequently activate the detection of the
Loop-Down Code by setting NLCDE1=”1” and NLCDE0=”0”. In this case, receiving the “001” Loop-Down Code
for longer than 5 seconds will set the NLCD bit to “1” and if the NLCD interrupt is enabled, the chip will initiate
an interrupt on every transition of NLCD. The host can respond to the request from the remote terminal and
remove Loop-Back condition. In the manual Network Loop-Up (NLCDE1=”0” and NLCDE0=”1”) and Loop-
Down (NLCDE1=”1” and NLCDE0=”0”) Code detection modes, the NLCD interface bit will be set to “1” upon
receiving the corresponding code in excess of 5 seconds in the receive data. The chip will initiate an interrupt
any time the status of the NLCD bit changes and the Network Loop-code interrupt is enabled.
In the Host mode, setting the interface bits NLCDE1=”1” and NLCDE0=”1” enables the automatic Loop-Code
detection and Remote Loop-Back activation mode if, TXTEST[2:0] is NOT equal to “110”. As this mode is
initiated, the state of the NLCD interface bit is reset to “0” and the chip is programmed to monitor the receive
input data for the Loop-Up Code. If the “00001” Network Loop-Up Code is detected in the receive data for
longer than 5 seconds in addition to the NLCD bit in the interface register being set, Remote Loop-Back is
automatically activated. The chip stays in remote Loop-Back even if it stops receiving the “00001” pattern. After
the chip detects the Loop-Up code, sets the NLCD bit and enters Remote Loop-Back, it automatically starts
monitoring the receive data for the Loop-Down code. In this mode however, the NLCD bit stays set even if the
receiver stops receiving the Loop-Up code, which is an indication to the host that the Remote Loop-Back is still
in effect. Remote Loop-Back is removed if the chip detects the “001” Loop-Down code for longer than 5
seconds. Detecting the “001” code also results in resetting the NLCD interface bit and initiating an interrupt.
The Remote Loop-Back can also be removed by taking the chip out of the Automatic detection mode by
programming it to operate in a different state. The chip will not respond to remote Loop-Back request if Local
Analog Loop-Back is activated locally. When programmed in Automatic detection mode the NLCD interface bit
stays “High” for the whole time the Remote Loop-Back is activated and initiates an interrupt any time the status
of the NLCD bit changes provided the Network Loop-code interrupt is enabled.
TRANSMIT AND DETECT QUASI-RANDOM SIGNAL SOURCE (TDQRSS)
Each channel of XRT83SL38 includes a QRSS pattern generation and detection block for diagnostic purposes
that can be activated only in the Host mode by setting the interface bits TXTEST2=”1”, TXTEST1=”0” and
TXTEST0=”0”. For T1 systems, the QRSS pattern is a 220-1pseudo-random bit sequence (PRBS) with no
more than 14 consecutive zeros. For E1 systems, the QRSS pattern is 215 -1 PRBS with an inverted output.
With QRSS and Analog Local Loop-Back enabled simultaneously, and by monitoring the status of the QRPD
interface bit, all main functional blocks within the transceiver can be verified.
When the receiver achieves QRSS synchronization with fewer than 4 errors in a 128 bits window, QRPD
changes from “Low” to “High”. After pattern synchronization, any bit error will cause QRPD to go “Low” for one
clock cycle. If the QRPDIE bit is enabled, any transition on the QRPD bit will generate an interrupt.
With TDQRSS activated, a bit error can be inserted in the transmitted QRSS pattern by transitioning the
INSBER interface bit from “0” to “1”. Bipolar violation can also be inserted either in the QRSS pattern, or input
data when operating in the single-rail mode by transitioning the INSBPV interface bit from “0” to “1”. The state
of INSBER and INSBPV bits are sampled on the rising edge of the TCLK_n. To insure the insertion of the bit
error or bipolar violation, a “0” should be written in these bit locations before writing a “1”.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT83SL38IB-F | 功能描述:时钟合成器/抖动清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| XRT83SL38IV | 制造商:EXAR 制造商全称:EXAR 功能描述:OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83VL38 | 制造商:EXAR 制造商全称:EXAR 功能描述:OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83VL38ES | 功能描述:界面开发工具 Eval System for XRT83L38 Series RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XRT83VL38IB | 制造商:EXAR 制造商全称:EXAR 功能描述:OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
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