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| 型号： | PEF3452 |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Line Interface Unit for DS3, STS 1 and E3 |
| 中文描述： | 线路接口单元的DS3中，STS 1和E3 |
| 文件页数： | 47/71页 |
| 文件大小： | 1372K |
| 代理商： | PEF3452 |
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PEF 3452
TE3-LIU V1.3
Operational Description
Preliminary Data Sheet
37
2001-12-05
PRELIMINARY
5
Operational Description
5.1
Operational Overview
The TE3-LIU can be operated in three principle modes, which are either E3, DS3 or
STS-1 mode. This basic operation mode selection has to be stable before the reset
signal goes inactive.
The device is programmable by pin selection. Direct connection to a microprocessor
data bus is possible by using the chip select pin (CS) as a write strobe.
5.2
Device Reset
The TE3-LIU is forced to the reset state if a low signal is input on pin RES (for minimum
period see page
42
). During reset, all output stages are in a high impedance state, all
internal flip-flops are reset.
The basic device mode (DS3, STS-1 or E3, jitter attenuation) has to be selected during
reset to enable the internal PLLs to adjust.
After reset all control input values are cleared. The default control values (driven by
internal pullups) are activated after CS
=
low is applied for the first time after reset.
5.3
Device Power Down
The TE3-LIU can be set into power down state to reduce power consumption, if not
active. Power down mode is selected by setting RL
=
LL
=
1. Receive and transmit circuits
are switched off including internal PLLs and transmit line driver. Recovery from power
down mode is achieved by clearing either of RL or LL (RL
=
0 and/or LL
=
0). After
recovery from power down, the internal PLLs need to stabilize again. REFCLK must be
active to recover from power down mode.
Internal pullup resistors are not switched off during power down to prevent open input
lines from floating.
Note: If switching directly from local loop to remote loop or vice versa, make sure that
there is no signal overlap, which would set the device into power down mode
unintentionally.
5.4
Transmit Line Inactive
If the transmitter is not used, it can be switched into inactive mode by setting XLT
=
1.
During inactive state the common mode voltage of 1.5 V is output on XL1 and XL2. The
transmit PLL is not stopped and output can be enabled again by XLT
=
0 without wait time.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PEF3452HV1.3 | 功能描述:接口 - 专用 T/E RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| PEF3452HV1.3A | 制造商:Infineon Technologies AG 功能描述: |
| PEF3452H-V13 | 功能描述:IC INTERACE LINE 3.3V 44-MQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 电信 系列:TE3-LIU™ 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| PEF3452HV13XP | 制造商:Lantiq 功能描述:LINE INTERFACE UNITS |
| PEF3460E | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:Single channel T3/E3 Framer & Line Interface for ATM, Frame Relay and PPP/IP |
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