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TNETV2685FIBZUT7 数据表(PDF) 172 Page - Texas Instruments |
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TNETV2685FIBZUT7 数据表(HTML) 172 Page - Texas Instruments |
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172 / 191 page  TMS320DM647 TMS320DM648 SPRS372H – MAY 2007 – REVISED APRIL 2012 www.ti.com 6.20 Management Data Input/Output (MDIO) The management data input/output (MDIO) module continuously polls all 32 MDIO addresses to enumerate all PHY devices in the system. It contains two user access registers to control and monitor up to two PHYs simultaneously. The MDIO module implements the 802.3 serial management interface to interrogate and control two Ethernet PHYs simultaneously using a shared two-wire bus. 6.20.1 MII Management Interface Host software uses the MDIO module to configure the auto-negotiation parameters of each PHY attached to the Ethernet Switch Subsystem, retrieve the negotiation results, and configure required parameters in the Ethernet Switch Subsystem 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 a maximum of two PHYs may be connected at any given time. For more detailed information on the Ethernet Switch Subsystem, see the TMS320DM647/DM648 DSP Ethernet Subsystem User's Guide Reference Guide (literature number SPRUF57). For a list of supported registers and register fields, see Table 6-84. 6.20.2 MDIO Register Descriptions Table 6-84. MDIO Registers HEX ADDRESS RANGE REGISTER ACRONYM DESCRIPTION 0x02D0 4000 MDIOVER Module version register 0x02D0 4004 MDIOCONTROL Module control register 0x02D0 4008 MDIOALIVE PHY acknowledge status register 0x02D0 400C MDIOLINK PHY link status register 0x02D0 4010 MDIOLINKINTRAW Link status change interrupt register (raw value) 0x02D0 4014 MDIOLINKINTMASKED Link status change interrupt register (masked value) 0x02D0 4018 - 0x02D0 401C reserved 0x02D0 4020 MDIOUSERINTRAW User command complete interrupt register (raw value) 0x02D0 4024 MDIOUSERINTMASKED User command complete interrupt register (masked value) 0x02D0 4028 MDIOUSERINTMASKSET User interrupt mask set register 0x02D0 402C MDIOUSERINTMASKCLR User interrupt mask clear register 0x02D0 4030 - 0x02D0 407C reserved 0x02D0 4080 MDIOUSERACCESS0 User access register0 0x02D0 4084 MDIOUSERPHYSEL0 User PHY select register0 0x02D0 4088 MDIOUSERACCESS1 User access register1 0x02D0 408C MDIOUSERPHYSEL1 User PHY select register1 0x02D0 4090 - 0x02D0 40FF reserved 172 Peripheral Information and Electrical Specifications Copyright © 2007–2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TMS320DM647 TMS320DM648 |
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