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| 型號(hào)： | DS3184+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 49/400頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC PACKET PHY W/LIU 400-CSBGA |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 40 |
| 類型： | 調(diào)幀器 |
| 應(yīng)用： | 數(shù)據(jù)傳輸 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 400-BBGA |
| 供應(yīng)商設(shè)備封裝： | 400-PBGA（27x27） |
| 包裝： | 管件 |
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DS3181/DS3182/DS3183/DS3184
142
in bit synchronous mode. Cell scrambling is programmable (payload, entire data stream, or DSS). If cell processing
is disabled, the entire data stream will be scrambled whenever scrambling is enabled
Once all cell processing has been completed, in bit synchronous mode, the 8-bit parallel data stream is multiplexed
into a serial data stream and passed on. In octet aligned mode, the 8-bit parallel data stream is passed on.
10.7.5.2 Receive Cell Processor
The Receive Cell Processor performs cell descrambling, cell delineation, cell filtering, header pattern comparison,
OCD detection, HEC error monitoring, HEC byte filtering, and bit reordering. The data coming in can be either a
serial data stream (bit synchronous mode) or an 8-bit parallel data stream (octet aligned mode). The type of data
stream received affects cell descrambling and cell delineation, however, it does not affect OCD detection, HEC
error monitoring, cell filtering, header pattern comparison, HEC byte filtering, or bit reordering. Cell processing can
be disabled (clear-channel enable). Disabling cell processing disables cell delineation, OCD detection, cell filtering,
header pattern comparison, HEC error monitoring, and HEC byte filtering. Only cell descrambling and bit reordering
are not disabled.
Cell descrambling can descramble the 48-byte cell payload, descramble the entire cell data stream, or descramble
a data stream scrambled by a Distributed Sample Scrambler (DSS). If the payload or the entire data stream is
descrambled, a self-synchronous scrambler with a generation polynomial of x
43 + 1 is used for descrambling.
Payload descrambling descrambles the 48-byte payload, and does not descramble the four header bytes or the
HEC byte. For a DSS scrambled data stream, a distributed sample scrambler with a generation polynomial of x
31 +
x
28 + 1 is used for descrambling. The receive DSS scrambler is synchronized to the transmit DSS scrambler by
DSS scrambler synchronization. DSS descrambling can only be performed in bit synchronous mode. Cell
descrambling is programmable (payload, entire data stream, or DSS). In bit synchronous mode, descrambling is
performed one bit at a time, and the serial data stream is demultiplexed in to an 8-bit data stream before being
passed on. In octet aligned mode, descrambling is performed 8-bits at a time, and only payload or entire data
stream descrambling can be performed. When cell processing is disabled, the entire data stream will be
descrambled if descrambling is enabled.
DSS Scrambler Synchronization synchronizes the receive DSS scrambler with the transmit DSS scrambler used to
scramble the incoming data stream. The DSS Scrambler Synchronization state machine has three states:
"Acquisition", "Verification", and "Steady State". The "Acquisition" state adds the transmit DSS scrambler samples
from 16 incoming cells into the receive DSS scrambler (32 samples total). The samples are derived from the two
MSBs (HEC[1:2]) of the incoming HEC byte. Each time the samples in a cell are loaded into the receive DSS
scrambler, the confidence counter is incremented. When the confidence counter reaches 16, DSS scrambler
synchronization transitions to the “Verification” state. The "Verification" state verifies the samples in the incoming
cells by comparing the samples from the cell with the corresponding receive DSS scrambler bits. Each time both
samples from a cell match the corresponding receive DSS scrambler bits, the confidence counter is incremented.
Each time one of the samples from a cell does not match the corresponding receive DSS scrambler bit, the
confidence counter is decremented if the confidence counter reaches 24, DSS scrambler synchronization
transitions to the “Steady State” state. If the confidence counter reaches 8, DSS scrambler synchronization
transitions to the “Acquisition” state. The "Steady State" state continues to verify the samples in the incoming cells.
Each time both samples from a cell match the corresponding receive DSS scrambler bits, the confidence counter is
incremented (maximum count = 24). Each time one of the samples from a cell does not match the corresponding
receive DSS scrambler bit, the confidence counter is decremented. If the confidence counter reaches 16, DSS
scrambler synchronization transitions to the “Acquisition” state. The DSS scrambler synchronization state diagram
is shown in Figure 10-26. DSS scrambler synchronization starts in the “Acquisition” state. Note: All ATM cells are
discarded during the “Acquisition” and “Verification” states.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| DS3184+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad ATM/Packet PHYs w/Built-In LIU 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 |
| DS3184DK | 功能描述:網(wǎng)絡(luò)開發(fā)工具 RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| DS3184N | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad ATM/Packet PHYs w/Built-In LIU 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 |
| DS3184N+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad ATM/Packet PHYs w/Built-In LIU 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 |
| DS318PIN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
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