參數(shù)資料
型號： DS2154LN
廠商： Maxim Integrated Products
文件頁數(shù)： 54/87頁
文件大?。?/td> 0K
描述： IC TXRX E1 1CHIP 5V ENH 100-LQFP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
產(chǎn)品變化通告： Product Discontinuation 20/Feb/2012
標(biāo)準(zhǔn)包裝： 90
類型： 收發(fā)器
驅(qū)動器/接收器數(shù)： 1/1
規(guī)程： E1
電源電壓： 4.75 V ~ 5.25 V
安裝類型： 表面貼裝
封裝/外殼： 100-LQFP
供應(yīng)商設(shè)備封裝： 100-LQFP（14x14）
包裝： 管件
DS2154
58 of 87
12 ADDITIONAL (Sa) AND INTERNATIONAL (Si) BIT OPERATION
The DS2154 provides for access to both the Sa and the Si bits via three different methods. The first is via
a hardware scheme using the RLINK/RLCLK and TLINK/ TLCLK pins. The first method is discussed in
Section 12.1. The second involves using the internal RAF/RNAF and TAF/TNAF registers and is
discussed in Section 12.2. The third method, which is covered in Section 12.3, involves an expanded
version of the second method and is one of the features added to the DS2154 from the original DS2153
definition.
12.1 Hardware Scheme
On the receive side, all the received data is reported at the RLINK pin. Via RCR2, the user can control
the RLCLK pin to pulse during any combination of Sa bits. This allows the user to create a clock that can
be used to capture the needed Sa bits. If RSYNC is programmed to output a frame boundary, it will
identify the Si bits. See Section 14 for detailed timing.
On the transmit side, the individual Sa bits can be either sourced from the internal TNAF register (see
Section 12.2 for details) or from the external TLINK pin. Via TCR2, the DS2154 can be programmed to
source any combination of the additional bits from the TLINK pin. If the user wishes to pass the Sa bits
through the DS2154 without them being altered, then the device should be set up to source all five Sa bits
via the TLINK pin and the TLINK pin should be tied to the TSER pin. Si bits can be inserted through the
TSER pin via the clearing of the TCR1.3 bit. See the timing diagrams and the transmit data flow diagram
in Section 14 for examples.
12.2 Internal Register Scheme Based on Double-Frame
On the receive side, the RAF and RNAF registers will always report the data as it received in the
Additional and International bit locations. The RAF and RNAF registers are updated with the setting of
the Receive Align Frame bit in Status Register 2 (SR2.6). The host can use the SR2.6 bit to know when to
read the RAF and RNAF registers. It has 250
s to retrieve the data before it is lost.
On the transmit side, data is sampled from the TAF and TNAF registers with the setting of the Transmit
Align Frame bit in Status Register 2 (SR2.3). The host can use the SR2.3 bit to know when to update the
TAF and TNAF registers. It has 250
s to update the data or else the old data will be retransmitted. Data
in the Si bit position will be overwritten if either the DS2154 is programmed: (1) to source the Si bits
from the TSER pin, (2) in the CRC4 mode, or (3) have automatic E-bit insertion enabled. Data in the Sa
bit position will be overwritten if any of the TCR2.3 to TCR2.7 bits are set to 1 (see Section 12.1 for
details). See the register descriptions for TCR1 and TCR2 and the Transmit Data Flow diagram
(Figure 14-11) for more details.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2154LN+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2154LNA2 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
DS2154LNA2+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2154LND2 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
DS2154LND2+ 制造商:Maxim Integrated Products 功能描述:ENHANCED E1 SCT LQFP REVD2 IND LF - Rail/Tube
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