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參數(shù)資料
| 型號(hào)： | DS21Q50N |
| 英文描述： | Telecommunication IC |
| 中文描述： | 通信集成電路 |
| 文件頁數(shù)： | 31/99頁 |
| 文件大?。?/td> | 325K |
| 代理商： | DS21Q50N |
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DS21Q50
Page 31 of 99
7.3 AUTOMATIC ALARM GENERATION
The device can be programmed to automatically transmit AIS or Remote Alarm. When automatic AIS
generation is enabled (CCR2.5 = 1), the device monitors the receive framer to determine if any of the following
conditions are present: loss of receive frame synchronization, AIS alarm (all one’s) reception, or loss of receive
carrier (or signal). If any one (or more) of the above conditions is present, then the framer will either force an
AIS alarm.
When automatic RAI generation is enabled (CCR2.4 = 1), the framer monitors the receive to determine if any of
the following conditions are present: loss of receive frame synchronization, AIS alarm (all one’s) reception, or
loss of receive carrier (or signal) or if CRC4 multiframe synchronization cannot be found within 128ms of FAS
synchronization (if CRC4 is enabled). If any one (or more) of the above conditions is present, then the framer
will either transmit a RAI alarm. RAI generation conforms to ETS 300 011 specifications and a constant Remote
Alarm will be transmitted if the DS21Q50 cannot find CRC4 multiframe synchronization within 400 ms as per
G.706.
Register Name:
CCR3
Register Description:
COMMON CONTROL REGISTER
Register Address:
14 Hex
Bit #
7
6
5
4
SYM
RLB
LLB
LIAIS
TCM4
TCM3
SYMBOL
BIT NAME AND DESCRIPTION
RLB
7
Remote Loopback.
See Section 7.4 for details
0 = loopback disabled
1 = loopback enabled
LLB
6
Local Loopback.
See Section 7.5 for details
0=loopback disabled
1=loopback enabled
LIAIS
5
Line Interface AIS Generation Enable.
0=allow normal data to be transmitted at TTIP and TRING
1=force unframed all ones to be transmitted at TTIP and TRING at the
MCLK rate
TCM4
4
Transmit Channel Monitor Bit 4
. MSB of a channel decode that
determines which transmit channel data will appear in the TDS0M
register. See Section 9 or details.
TCM3
3
Transmit Channel Monitor Bit 3.
TCM2
2
Transmit Channel Monitor Bit 2.
TCM1
1
Transmit Channel Monitor Bit 1.
TCM0
0
Transmit Channel Monitor Bit 0.
LSB of the channel decode.
3
2
1
0
TCM2
TCM1
TCM0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| DS21Q55 | 功能描述:IC TXRX QUAD T1/E1/J1 SCT 256BGA RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:* |
| DS21Q552 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad T1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q552+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad T1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q552B | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS21Q552BN | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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