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AM1705DPTPA3 Fiches technique(PDF) 85 Page - Texas Instruments |
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AM1705DPTPA3 Fiches technique(HTML) 85 Page - Texas Instruments |
85 / 165 page AM1705 www.ti.com SPRS657E – FEBRUARY 2010 – REVISED JUNE 2014 6.15 Management Data Input/Output (MDIO) The Management Data Input/Output (MDIO) module continuously polls all 32 MDIO addresses in order to enumerate all PHY devices in the system. The Management Data Input/Output (MDIO) module implements the 802.3 serial management interface to interrogate and control Ethernet PHY(s) using a shared two-wire bus. Host software uses the MDIO module to configure the auto-negotiation parameters of each PHY attached to the EMAC, retrieve the negotiation results, and configure required parameters in the EMAC module for correct operation. The module is designed to allow almost transparent operation of the MDIO interface, with very little maintenance from the core processor. Only one PHY may be connected at any given time. 6.15.1 MDIO Registers For a list of supported MDIO registers see Table 6-37 [MDIO Registers]. Table 6-37. MDIO Register Memory Map BYTE ADDRESS ACRONYM REGISTER DESCRIPTION 0x01E2 4000 REV Revision Identification Register 0x01E2 4004 CONTROL MDIO Control Register 0x01E2 4008 ALIVE MDIO PHY Alive Status Register 0x01E2 400C LINK MDIO PHY Link Status Register 0x01E2 4010 LINKINTRAW MDIO Link Status Change Interrupt (Unmasked) Register 0x01E2 4014 LINKINTMASKED MDIO Link Status Change Interrupt (Masked) Register 0x01E2 4018 – Reserved 0x01E2 4020 USERINTRAW MDIO User Command Complete Interrupt (Unmasked) Register 0x01E2 4024 USERINTMASKED MDIO User Command Complete Interrupt (Masked) Register 0x01E2 4028 USERINTMASKSET MDIO User Command Complete Interrupt Mask Set Register 0x01E2 402C USERINTMASKCLEAR MDIO User Command Complete Interrupt Mask Clear Register 0x01E2 4030 - 0x01E2 407C – Reserved 0x01E2 4080 USERACCESS0 MDIO User Access Register 0 0x01E2 4084 USERPHYSEL0 MDIO User PHY Select Register 0 0x01E2 4088 USERACCESS1 MDIO User Access Register 1 0x01E2 408C USERPHYSEL1 MDIO User PHY Select Register 1 0x01E2 4090 - 0x01E2 47FF – Reserved Copyright © 2010–2014, Texas Instruments Incorporated Peripheral Information and Electrical Specifications 85 Submit Documentation Feedback Product Folder Links: AM1705 |
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