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RTL8111B Datasheet(PDF) 74 Page - Realtek Semiconductor Corp. |
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RTL8111B Datasheet(HTML) 74 Page - Realtek Semiconductor Corp. |
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74 / 75 page  RTL8111B/RTL8168B Registers Datasheet Integrated Gigabit Ethernet Controller for PCI Express 68 Track ID: JATR-1076-21 Rev. 1.0 MII (10Mbps) Mode The received differential signal is converted into a Manchester-encoded stream first. Next, the stream is processed with a Manchester decoder and is de-serialized into 4-bit-wide nibbles. The 4-bit nibbles are presented to the MII interface at a clock speed of 2.5MHz. 6.5. Next Page If 1000Base-T mode is advertised, three additional Next Pages are automatically exchanged between the two link partners. Users can set Reg4.15 to 1 to exchange extra Next Pages via Reg7 and Reg8 as defined in IEEE 802.3ab. 6.6. EEPROM Interface The RTL8111B/RTL8168B requires the attachment of an external EEPROM. The 93C46/93C56 is a 1K-bit/2K-bit EEPROM. The EEPROM interface permits the RTL8111B/RTL8168B to read from, and write data to, an external serial EEPROM device. Values in the external EEPROM allow default fields in PCI configuration space and I/O space to be overridden following a power-on or software EEPROM auto load command. The RTL8111B/RTL8168B will auto-load values from the EEPROM. If the EEPROM is not present, the RTL8111B/RTL8168B initialization uses default values for the appropriate Configuration and Operational Registers. Software can read and write to the EEPROM using “bit-bang” accesses via the 9346CR Register, or using PCI VPD. The interface consists of EESK, EECS, EEDO, and EEDI. Table 59. EEPROM Interface EEPROM Description EECS 93C46 (93C56) chip select EESK EEPROM serial data clock EEDI/Aux Input data bus/Input pin to detect whether Aux. Power exists on initial power-on. This pin should be connected to EEPROM. To support wakeup from ACPI D3cold or APM power-down, this pin must be pulled high to Aux. Power via a resistor. If this pin is not pulled high to Aux. Power, the RTL8111B/RTL8168B assumes that no Aux. Power exists. EEDO Output data bus |
Similar Part No. - RTL8111B |
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Similar Description - RTL8111B |
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