參數(shù)資料
型號： DS21FT42
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù)： 41/145頁
文件大?。?/td> 466K
代理商： DS21FT42
DALLAS SEMICONDUCTOR
DS21FF42/DS21FT42
101899
/1231
TESMDM
CCR3.0
Transmit Elastic Store Minimum Delay Mode.
See Section 17 for
details.
0 = elastic stores operate at full two frame depth
1 = elastic stores operate at 32–bit depth
Pulse Density Enforcer
The Framer always examines both the transmit and receive data streams for violations of the following rules
which are required by ANSI T1.403:
– no more than 15 consecutive zeros
– at least N ones in each and every time window of 8 x (N +1) bits where N = 1 through 23
Violations for the transmit and receive data streams are reported in the RIR2.0 and RIR2.1 bits respectively.
When the CCR3.3 is set to one, the DS21Q42 will force the transmitted stream to meet this requirement no
matter the content of the transmitted stream. When running B8ZS, the CCR3.3 bit should be set to zero since
B8ZS encoded data streams cannot violate the pulse density requirements.
CCR4: COMMON CONTROL REGISTER 4
(Address=11 Hex)
(MSB)
RSRE
(LSB)
TIRFS
RPCSI
RFSA1
RFE
RFF
THSE
TPCSI
SYMBOL
POSITION
NAME AND DESCRIPTION
RSRE
CCR4.7
Receive Side Signaling Re–Insertion Enable.
See Section 14 for
details.
0 = do not re–insert signaling bits into the data stream presented at the
RSER pin
1 = reinsert the signaling bits into data stream presented at the RSER
pin
Receive Per–Channel Signaling Insert.
See Section 14 for more
details.
0 = do not use RCHBLK to determine which channels should have
signaling re–inserted
1 = use RCHBLK to determine which channels should have signaling
re–inserted
Receive Force Signaling All Ones.
See Section 14 for more details.
0 = do not force extracted robbed–bit signaling bit positions to a one
1 = force extracted robbed–bit signaling bit positions to a one
Receive Freeze Enable.
See Section 14 for details.
0 = no freezing of receive signaling data will occur
1 = allow freezing of receive signaling data at RSIG (and RSER if
CCR4.7 = 1).
RPCSI
CCR4.6
RFSA1
CCR4.5
RFE
CCR4.4
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21FT42N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer 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
DS21FT44 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
DS21FT44+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4X3 E1 Framer E1 Framer E1 Framer 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
DS21FT44N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl E1/E1 Framer 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
DS21FT44N+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl E1/E1 Framer 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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