- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1914 > DS21Q42T+ (Maxim Integrated Products)IC FRAMER ENHANCED T1 4X 128TQFP PDF資料下載
參數(shù)資料
| 型號： | DS21Q42T+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 91/116頁 |
| 文件大小： | 0K |
| 描述： | IC FRAMER ENHANCED T1 4X 128TQFP |
| 標準包裝： | 72 |
| 控制器類型： | T1 調(diào)幀器 |
| 接口： | 并行/串行 |
| 電源電壓： | 2.97 V ~ 3.63 V |
| 電流 - 電源： | 75mA |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-LQFP |
| 供應(yīng)商設(shè)備封裝： | 128-LQFP（14x20） |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁當(dāng)前第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁
DS21Q42
76 of 116
17.
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
determining which channels are to have Bit 7 stuffing performed. If the TCR2.0 and TCR1.3 bits are set
to one, then all 24 T1 channels will have Bit 7 stuffing performed on them regardless of how the TTR
registers are programmed. In this manner, the TTR registers are only affecting which channels are to
have robbed bit signaling inserted into them. Please see Figure 20-15 for more details.
18.
INTERLEAVED PCM BUS OPERATION
In many architectures, the outputs of individual framers are combined into higher speed serial buses to
simplify transport across the system. The DS21Q42 can be configured to allow each framer’s data and
signaling busses to be multiplexed into higher speed data and signaling busses eliminating external
hardware saving board space and cost.
The interleaved PCM bus option supports two bus speeds and interleave modes. The 4.096 MHz bus
speed allows two framers to share a common bus. The 8.192 MHz bus speed allows all four of the
DS21Q42’s framers to share a common bus. Framers can interleave their data either on byte or frame
boundaries. Framers that share a common bus must be configured through software and require several
device pins to be connected together externally (see figures 18-1 & 18-2). Each framer’s elastic stores
must be enabled and configured for 2.048 MHz operation. The signal RSYNC must be configured as an
input on each framer.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS21Q43-ATN | IC FRAMER E1 QUAD 5V 128-TQFP |
| DS21Q44T+ | IC FRAMER ENHANCED E1 4X 128TQFP |
| DS21Q50LN | IC TRANSCEIVER E1 QD IND 100LQFP |
| DS21Q55 | IC TXRX QUAD T1/E1/J1 SCT 256BGA |
| DS21Q59LN+ | IC TXRX E1 QUAD 100-LQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS21Q42T+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad 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 |
| DS21Q42TN | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad 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 |
| DS21Q43A | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Quad E1 Framer |
| DS21Q43AT | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad 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 |
| DS21Q43AT+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。