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参数资料
| 型号： | DS21Q58 |
| 英文描述： | E1 Quad Transceiver |
| 中文描述： | E1四收发器 |
| 文件页数： | 22/74页 |
| 文件大小： | 647K |
| 代理商： | DS21Q58 |
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DS21Q58 E1 Quad Transceiver
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8.3 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 ones) reception, or loss-of-receive carrier (or signal).
If one (or more) of these conditions is present, the framer forces an AIS alarm.
When automatic RAI generation is enabled (CCR2.4 = 1), the receiver is monitored to determine if any of the
following conditions are present: loss-of-receive frame synchronization, AIS alarm (all ones) 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 one (or more) of these conditions is present, the device transmits an RAI
alarm. RAI generation conforms to ETS 300 011 specifications, and a constant remote alarm is transmitted if the
DS21Q58 cannot find CRC4 multiframe synchronization within 400ms as per G.706.
Register Name:
CCR3
Register Description:
Common Control Register
Register Address:
14 Hex
Bit #
7
6
5
4
Name
RLB
LLB
LIAIS
TCM4
TCM3
NAME
BIT
FUNCTION
Remote Loopback.
See Section
8.4
for details.
0 = loopback disabled
1 = loopback enabled
Local Loopback.
See Section
8.5
for details.
0 = loopback disabled
1 = loopback enabled
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
Transmit Channel Monitor Bit 4
. MSB of a channel decode that
determines which transmit channel data appears in the TDS0M register.
See Section
10
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
RLB
7
LLB
6
LIAIS
5
TCM4
4
8.4 Remote Loopback
When CCR4.7 is set to 1, the DS21Q58 is forced into remote loopback (RLB) mode. In this loopback, data input
through the RPOSI and RNEGI pins is transmitted back to the TPOSO and TNEGO pins. Data continues to pass
through the DS21Q58’s receive framer as it would normally and the data from the transmit formatter is ignored
(
Figure 3-1
).
相关PDF资料 |
PDF描述 |
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| DS21Q58L | E1 Quad Transceiver |
| DS21Q58LN | E1 Quad Transceiver |
| DS21Q58 | Dallas Semiconductor |
| DS2227-70 | Flexible NV SRAM Stik |
| DS2227-100 | Flexible NV SRAM Stik |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS21Q58L | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58L+ | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58LN | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58LN+ | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q59 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:RELIABILITY REPORT FOR DS21Q59, REV A2 |
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