參數(shù)資料
型號： DS21Q44T+
廠商： Maxim Integrated Products
文件頁數(shù)： 63/105頁
文件大小： 0K
描述： IC FRAMER ENHANCED E1 4X 128TQFP
標(biāo)準(zhǔn)包裝： 72
控制器類型： E1 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
DS21Q44
60 of 105
SYMBOL
POSITION
NAME AND DESCRIPTION
Sa5
TSaCR.3
Additional Bit 5 Insertion Control Bit.
0=do not insert data from the TSa5 register into the transmit data
stream.
1=insert data from the TSa5 register into the transmit data
stream.
Sa6
TSaCR.2
Additional Bit 6 Insertion Control Bit.
0=do not insert data from the TSa6 register into the transmit data
stream.
1=insert data from the TSa6 register into the transmit data
stream.
Sa7
TSaCR.1
Additional Bit 7 Insertion Control Bit.
0=do not insert data from the TSa7 register into the transmit data
stream.
1=insert data from the TSa7 register into the transmit data
stream.
Sa8
TSaCR.0
Additional Bit 8 Insertion Control Bit.
0=do not insert data from the TSa8 register into the transmit data
stream.
1=insert data from the TSa8 register into the transmit data
stream.
15. HDLC CONTROLLER FOR THE SA BITS OR DS0
Each framer in the DS21Q44 has the ability to extract/insert data from/ into the Sa bit positions (Sa4 to
Sa8) or from/to any multiple of DS0 channels Each framer contains a complete HDLC controller and this
operation is covered in Section 15.1.
15.1 General Overview
Each framer contains a complete HDLC controller with 64–byte buffers in both the transmit and receive
directions. The HDLC controller performs all the necessary overhead for generating and receiving a
HDLC formatted message.
The HDLC controller automatically generates and detects flags, generates and checks the CRC check
sum, generates and detects abort sequences, stuffs and destuffs zeros (for transparency), and byte aligns to
the HDLC data stream.
There are eleven registers that the host will use to operate and control the operation of the HDLC
controller. A brief description of the registers is shown in Table 15-1.
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參數(shù)描述
DS21Q44T+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced 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
DS21Q44TN 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
DS21Q48 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad E1/T1/J1 Line Interface 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
DS21Q48A3N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad E1/T1/J1 Line Interface 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
DS21Q48B 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
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