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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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DP83849IF bảng dữ liệu(PDF) 75 Page - National Semiconductor (TI) |
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DP83849IF bảng dữ liệu(HTML) 75 Page - National Semiconductor (TI) |
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75 / 108 page  75 www.national.com 8 LOOPBACK_10_DIS 0, RW 10Base-T Loopback Disable: In half-duplex mode, default 10BASE-T operation loops Transmit data to the Receive data in addition to transmitting the data on the physical medium. This is for consistency with earlier 10BASE2 and 10BASE5 implementations which used a shared medium. Setting this bit disables the loopback function. This bit does not affect loopback due to setting BMCR[14]. 7 LP_DIS 0, RW Normal Link Pulse Disable: 1 = Transmission of NLPs is disabled. 0 = Transmission of NLPs is enabled. 6 FORCE_LINK_10 0, RW Force 10Mb Good Link: 1 = Forced Good 10Mb Link. 0 = Normal Link Status. 5 RESERVED 0, RW RESERVED: Must be zero. 4 POLARITY RO/LH 10Mb Polarity Status: This bit is a duplication of bit 12 in the PHYSTS register. Both bits will be cleared upon a read of 10BTSCR register, but not upon a read of the PHYSTS register. 1 = Inverted Polarity detected. 0 = Correct Polarity detected. 3 RESERVED 0, RW RESERVED: Must be zero. 2 RESERVED 1, RW RESERVED: Must be set to one. 1 HEARTBEAT_DIS 0, RW Heartbeat Disable: This bit only has influence in half-duplex 10Mb mode. 1 = Heartbeat function disabled. 0 = Heartbeat function enabled. When the device is operating at 100Mb or configured for full duplex operation, this bit will be ignored - the heartbeat func- tion is disabled. 0 JABBER_DIS 0, RW Jabber Disable: Applicable only in 10BASE-T. 1 = Jabber function disabled. 0 = Jabber function enabled. Table 39. 10Base-T Status/Control Register (10BTSCR), address 1Ah (Continued) Bit Bit Name Default Description |
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