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    參數(shù)資料
    型號: DS21554L
    廠商: Maxim Integrated Products
    文件頁數(shù): 72/124頁
    文件大?。?/td> 0K
    描述: IC TXRX E1 1-CHIP 5V 100-LQFP
    產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
    產(chǎn)品變化通告: Product Discontinuation 20/Feb/2012
    標準包裝: 90
    功能: 單芯片收發(fā)器
    接口: E1,HDLC,J1,T1
    電路數(shù): 1
    電源電壓: 4.75 V ~ 5.25 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: 100-LQFP
    供應商設(shè)備封裝: 100-LQFP(14x14)
    包裝: 托盤
    包括: 遠程和 AIS 警報檢測器 / 發(fā)生器
    DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
    51 of 124
    7.2.
    CRC4 Error Counter
    CRC4 Count Register 1 (CRCCR1) is the most significant word and CRCCR2 is the least significant
    word of a 10-bit counter that records word errors in the Cyclic Redundancy Check 4 (CRC4). Since the
    maximum CRC4 count in a one second period is 1000, this counter cannot saturate. The counter is
    disabled during loss of sync at either the FAS or CRC4 level; it will continue to count if loss of
    multiframe sync occurs at the CAS level.
    CRCCR1: CRC4 COUNT REGISTER 1 (Address = 02 Hex)
    CRCCR2: CRC4 COUNT REGISTER 2 (Address = 03 Hex)
    (MSB)
    (LSB)
    (See Note)
    CRC9
    CRC8
    CRCCR1
    CRC7
    CRC6
    CRC5
    CRC4
    CRC3
    CRC2
    CRC1
    CRC0
    CRCCR2
    SYMBOL
    POSITION
    NAME AND DESCRIPTION
    CRC9
    CRCCR1.1
    MSB of the 10-Bit CRC4 error count
    CRC0
    CRCCR2.0
    LSB of the 10-Bit CRC4 error count
    Note: The upper six bits of CRCCR1 at address 02 are the most significant bits of the 12-bit FAS error counter.
    7.3.
    E-Bit Counter
    E–bit Count Register 1 (EBCR1) is the most significant word and EBCR2 is the least significant word of
    a 10–bit counter that records Far-End Block Errors (FEBE) as reported in the first bit of frames 13 and 15
    on E1 lines running with CRC4 multiframe. These count registers will increment once each time the
    received E-bit is set to zero. Since the maximum E-bit count in a one second period is 1000, this counter
    cannot saturate. The counter is disabled during loss of sync at either the FAS or CRC4 level; it will
    continue to count if loss of multiframe sync occurs at the CAS level.
    EBCR1: E-BIT COUNT REGISTER 1 (Address = 04 Hex)
    EBCR2: E-BIT COUNT REGISTER 2 (Address = 05 Hex)
    (MSB)
    (LSB)
    (See Note)
    EB9
    EB8
    EBCR1
    EB7
    EB6
    EB5
    EB4
    EB3
    EB2
    EB1
    EB0
    EBCR2
    SYMBOL
    POSITION
    NAME AND DESCRIPTION
    EB9
    EBCR1.1
    MSB of the 10-Bit E-Bit Error Count
    EB0
    EBCR2.0
    LSB of the 10-Bit E-Bit Error Count
    Note: The upper six bits of EBCR1 at address 04 are the least significant bits of the 12-bit FAS error counter.
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    參數(shù)描述
    DS21554L+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3/5V E1 Transceiver 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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