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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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DP83255AVF bảng dữ liệu(PDF) 27 Page - National Semiconductor (TI) |
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DP83255AVF bảng dữ liệu(HTML) 27 Page - National Semiconductor (TI) |
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27 / 96 page  50 Registers (Continued) CURRENT TRANSMIT STATE REGISTER (CTSR) The Current Transmit State Register can program the Transmitter Block to internally generate and transmit Idle Master Halt Quiet or user programmable symbol pairs in addition to the normal transmission of incoming PHY Request data The Smoother and PHY Request Data Parity may also be enabled and disabled through this register The Transmit Modes overwrite the Repeat Filter and Smoother outputs while the Injection Symbols overwrite the Transmit Modes During the reset process (ie RST e GND) the Transmit Mode is set to Off (TMk20l e 010) the Smoother is enabled (ie SE is set to 1) and the Reserved bit (b7) is set to 1 All other bits of this register are cleared (ie set to 0) during the reset process ACCESS RULES ADDRESS READ WRITE 04h Always Conditional D7 D6 D5 D4 D3 D2 D1 D0 RES PRDPE SE IC1 IC0 TM2 TM1 TM0 Bit Symbol Description D0 D1 TM0 TM1 Transmit Mode k0 1 2l These bits select one of the 6 transmission modes for the PMD Request Data output port (TXDg) D2 TM2 TM2 TM1 TM0 000 Active Transmit Mode (ATM) Normal transmission of incoming PHY Request data 001 Idle Transmit Mode (ITM) Transmission of Idle symbol pairs (11111 11111) 010 Off Transmit Mode (OTM) Transmission of Quiet symbol pairs (00000 00000) and deassertion of the FOTX Enable pin (TXE) 011 Reserved Reserved for future use Users are discouraged from using this transmit mode If selected however the transmitter will generate Quiet symbol pairs (00000 00000) 100 Master Transmit Mode (MTM) Transmission of Halt and Quiet symbol pairs (00100 00000) 101 Halt Transmit Mode (HTM) Transmission of Halt symbol pairs (00100 00100) 110 Quiet Transmit Mode (QTM) Transmission of Quiet symbol pairs (00000 00000) 111 Reserved Reserved for future use Users are discouraged from using this transmit mode If selected however the transmitter will generate Quiet symbol pairs (00000 00000) 27 |
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