參數(shù)資料
型號： DS21FF42N
廠商： DALLAS SEMICONDUCTOR
元件分類： Digital Transmission Controller
英文描述： DATACOM, FRAMER, PBGA300
封裝： 27 X 27 MM, BGA-300
文件頁數(shù)： 96/115頁
文件大?。?/td> 534K
代理商： DS21FF42N
DS21FF42/DS21FT42
81 of 115
RDNCD: RECEIVE DOWN CODE DEFINITION REGISTER (Address=15 Hex)
(MSB)
(LSB)
C7
C6
C5
C4
C3
C2
C1
C0
SYMBOL
POSITION
NAME AND DESCRIPTION
C7
RDNCD.7
Receive Down Code Definition Bit 7. First bit of the
repeating pattern.
C6
RDNCD.6
Receive Down Code Definition Bit 6. A Don’t Care if a 1
bit length is selected.
C5
RDNCD.5
Receive Down Code Definition Bit 5. A Don’t Care if a 1
or 2 bit length is selected.
C4
RDNCD.4
Receive Down Code Definition Bit 4. A Don’t Care if a 1
to 3 bit length is selected.
C3
RDNCD.3
Receive Down Code Definition Bit 3. A Don’t Care if a 1
to 4 bit length is selected.
C2
RDNCD.2
Receive Down Code Definition Bit 2. A Don’t Care if a 1
to 5 bit length is selected.
C1
RDNCD.1
Receive Down Code Definition Bit 1. A Don’t Care if a 1
to 6 bit length is selected.
C0
RDNCD.0
Receive Down Code Definition Bit 0. A Don’t Care if a 1
to 7 bit length is selected.
21.
TRANSMIT TRANSPARENCY
Each of the 24 T1 channels in the transmit direction of the framer can be either forced to be transparent or
in other words, can be forced to stop Bit 7 Stuffing and/or Robbed Signaling from overwriting the data in
the channels. Transparency can be invoked on a channel by channel basis by properly setting the TTR1,
TTR2, and TTR3 registers.
TTR1/TTR2/TTR3: TRANSMIT TRANSPARENCY REGISTER
(Address=39 to 3B Hex)
(MSB)
(LSB)
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
TTR1 (39)
CH16
CH15
CH14
CH13
CH12
CH11
CH10
CH9
TTR2 (3A)
CH24
CH23
CH22
CH21
CH20
CH19
CH18
CH17
TTR3 (3B)
SYMBOLS
POSITIONS
NAME AND DESCRIPTION
CH1-24
TTR1.0-3.7
Transmit Transparency Registers.
0 = this DS0 channel is not transparent
1 = this DS0 channel is transparent
Each of the bit position in the Transmit Transparency Registers (TTR1/TTR2/TTR3) represent a DS0
channel in the outgoing frame. When these bits are set to a one, the corresponding channel is transparent
(or clear). If a DS0 is programmed to be clear, no robbed bit signaling will be inserted nor will the
channel have Bit 7 stuffing performed. However, in the D4 framing mode, Bit 2 will be overwritten by a
zero when a Yellow Alarm is transmitted. Also the user has the option to prevent the TTR registers from
相關PDF資料
PDF描述
DS21FT44N DATACOM, FRAMER, PBGA300
DS21FT44 DATACOM, FRAMER, PBGA300
DS21Q352 DATACOM, PCM TRANSCEIVER, PBGA256
DS21Q354 DATACOM, PCM TRANSCEIVER, PBGA256
DS21Q41BT DATACOM, FRAMER, PQFP128
相關代理商/技術參數(shù)
參數(shù)描述
DS21FF42N+ 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
DS21FF44 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
DS21FF44N 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
DS21FT40 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Four x Three 12 Channel E1 Framer
DS21FT40N 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
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