參數(shù)資料
型號(hào)： DS21554L
廠商： DALLAS SEMICONDUCTOR
元件分類： Digital Transmission Interface
英文描述： DATACOM, PCM TRANSCEIVER, PQFP100
封裝： 14 X 14 MM, LQFP-100
文件頁(yè)數(shù)： 47/117頁(yè)
文件大?。?/td> 698K
代理商： DS21554L
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DS21354 & DS21554
35 of 117
CCR2: COMMON CONTROL REGISTER 2 (Address=1A Hex)
(MSB)
(LSB)
ECUS
VCRFS
AAIS
ARA
RSERC
LOTCMC
RFF
RFE
SYMBOL
POSITION NAME AND DESCRIPTION
ECUS
CCR2.7
Error Counter Update Select. See Section 8 for details.
0 = update error counters once a second
1 = update error counters every 62.5 ms (500 frames)
VCRFS
CCR2.6
VCR Function Select. See Section 8.1 for details.
0 = count BiPolar Violations (BPVs)
1 = count Code Violations (CVs)
AAIS
CCR2.5
Automatic Transmit AIS Generation.
0 = disabled
1 = enabled
ARA
CCR2.4
Automatic Remote Alarm Generation.
0 = disabled
1 = enabled
RSERC
CCR2.3
RSER Control.
0 = allow RSER to output data as received under all conditions
1 = force RSER to one under loss of frame alignment conditions
LOTCMC
CCR2.2
Loss of Transmit Clock Mux Control. Determines whether the transmit
side formatter should switch to the ever present RCLKO if the TCLK
should fail to transition (see Figure 3-1).
0 = do not switch to RCLKO if TCLK stops
1 = switch to RCLKO if TCLK stops
RFF
CCR2.1
Receive Force Freeze. Freezes receive side signaling at RSIG (and TS16
in RSER if CCR3.3=1); will override Receive Freeze Enable (RFE). See
Section 10.2 for details.
0 = do not force a freeze event
1 = force a freeze event
RFE
CCR2.0
Receive Freeze Enable. See Section 10.2 for details.
0 = no freezing of receive signaling data will occur
1 = allow freezing of receive signaling data at RSIG (and TS16 in RSER
if CCR3.3 = 1).
6.3 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 side 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 side 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.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21554L+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3/5V E1 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
DS21554LB 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3/5V E1 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
DS21554LB+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3/5V E1 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
DS21554LBN 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
DS21554LBN+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3/5V E1 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
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