參數(shù)資料
型號： DS21FT42
元件分類： 通信及網(wǎng)絡
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)： 68/145頁
文件大?。?/td> 466K
代理商： DS21FT42
DALLAS SEMICONDUCTOR
DS21FF42/DS21FT42
101899
/1238
C7
C0
TC1.7
TC1.0
MSB of the Code (this bit is transmitted first)
LSB of the Code (this bit is transmitted last)
TCC1/TCC2/TCC3: TRANSMIT CHANNEL CONTROL REGISTER
(Address=16 to 18 Hex)
(MSB)
CH8
CH16
CH24
(LSB)
CH1
CH9
CH17
CH7
CH15
CH23
CH6
CH14
CH22
CH5
CH13
CH21
CH4
CH12
CH20
CH3
CH11
CH19
CH2
CH10
CH18
TCC1 (16)
TCC2 (17)
TCC3 (18)
SYMBOL
POSITION
NAME AND DESCRIPTION
CH1 - 24
TCC1.0 - 3.7
Transmit Code Insertion Control Bits
0 = do not insert data from the TC register into the transmit data
stream
1 = insert data from the TC register into the transmit data stream
15.2
RECEIVE SIDE CODE GENERATION
In the receive direction there are also two methods by which channel data to the backplane
can be overwritten with data generated by the framer. The first method which is covered in
Section 15.2.1 was a feature contained in the original DS21Q41 while the second method
which is covered in Section 15.2.2 is a new feature of the DS21Q42.
15.2.1
Simple Code Insertion
The first method on the receive side involves using the Receive Mark Registers (RMR1/2/3)
to determine which of the 24 T1 channels should be overwritten with either a 7Fh idle code
or with a digital milliwatt pattern. The RCR2.7 bit will determine which code is used. The
digital milliwatt code is an eight byte repeating pattern that represents a 1 KHz sine wave
(1E/0B/0B/1E/9E/8B/8B/9E). Each bit in the RMRs, represents a particular channel. If a bit
is set to a one, then the receive data in that channel will be replaced with one of the two
codes. If a bit is set to zero, no replacement occurs.
RMR1/RMR2/RMR3: RECEIVE MARK REGISTERS
(Address=2D to 2F Hex)
(MSB)
(LSB)
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相關代理商/技術參數(shù)
參數(shù)描述
DS21FT42N 功能描述:網(wǎng)絡控制器與處理器 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44 功能描述:網(wǎng)絡控制器與處理器 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44+ 功能描述:網(wǎng)絡控制器與處理器 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44N 功能描述:網(wǎng)絡控制器與處理器 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44N+ 功能描述:網(wǎng)絡控制器與處理器 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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