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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DP83256 датащи(PDF) 16 Page - National Semiconductor (TI) |
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DP83256 датащи(HTML) 16 Page - National Semiconductor (TI) |
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16 / 144 page  30 Functional Description (Continued) LINE STATE GENERATOR The Line State Generator allows the transmission of the PHY Request data and can also generate and transmit Idle Master Halt or Quiet symbol pairs which can be used to implement the Connection Management procedures as specified in the FDDI Station Management (SMT) standard document The Line State Generator is programmed through Transmit bits 0 to 2 (TMk20l) of the Current Transmit State Regis- ter (CTSR) Based on the setting of these bits the Transmitter Block operates in a Transmit Mode where the Line State Genera- tor overwrites the Repeat Filter and Smoother outputs See INJECTION CONTROL LOGIC section for a listing of the injection Transmit Modes Table 3-4 describes the Transmit Modes TABLE 3-4 Transmit Modes Transit Mode Behavior Active Transmit Mode Transmit data that comes from Configuration Switch Off Transmit Mode Transmit Quiet symbol pairs and disable the PMD Transmitter Idle Transmit Mode Transmit Idle symbol pairs Master Transmit Mode Transmit Halt-Quiet symbol pairs Quiet Transmit Mode Transmit Quiet symbol pairs Reserved Transmit Mode Reserved for future use If Mode selected Quiet symbol pairs will be transmitted Halt Transmit Mode Transmit Halt Symbol pairs Notes TLF11708 – 7 SE Smoother Enable C Preamble Counter F IDLE Force Idle (Stop or ATM) Xn Current Byte Xn–1 Previous Byte W RST FIGURE 3-6 Smoother State Diagram 16 |
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