TMS320TCI6487
TMS320TCI6488
Communications Infrastructure Digital Signal Processor
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SPRS358F–APRIL 2007–REVISED AUGUST 2008
8.13 Management Data Input/Output (MDIO)
The Management Data Input/Output (MDIO) module implements the 802.3 serial management interface to
interrogate and controls up to 32 Ethernet PHY(s) connected to the device, using a shared two-wire bus.
Application 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.
The EMAC control module is the main interface between the device core processor, the MDIO module,
and the EMAC module. The relationship between these three components is shown in Figure 8-30.
For more detailed information on the EMAC/MDIO, see the TMS320TCI6487/8TMS320C6474 DSP
EMAC/MDIO Module Reference Guide (literature number SPRUEF0).
8.13.1 MDIO Peripheral Register Description(s)
The memory map of the MDIO is shown in Table 8-50.
Table 8-50. MDIO Registers
HEX ADDRESS
02C8 1800
ACRONYM
VERSION
REGISTER NAME
MDIO Version Register
MDIO Control Register
02C8 1804
CONTROL
02C8 1808
ALIVE
MDIO PHY Alive Status Register
02C8 180C
LINK
MDIO PHY Link Status Register
02C8 1810
LINKINTRAW
LINKINTMASKED
-
MDIO link Status Change Interrupt (unmasked) Register
MDIO link Status Change Interrupt (masked) Register
Reserved
02C8 1814
02C8 1818 - 02C8 181C
02C8 1820
USERINTRAW
USERINTMASKED
USERINTMASKSET
USERINTMASKCLEAR
-
MDIO User Command Complete Interrupt (Unmasked) Register
MDIO User Command Complete Interrupt (Masked) Register
MDIO User Command Complete Interrupt Mask Set Register
MDIO User Command Complete Interrupt Mask Clear Register
Reserved
02C8 1824
02C8 1828
02C8 182C
02C8 1830 - 02C8 187C
02C8 1880
USERACCESS0
USERPHYSEL0
USERACCESS1
USERPHYSEL1
-
MDIO User Access Register 0
02C8 1884
MDIO User PHY Select Register 0
02C8 1888
MDIO User Access Register 1
02C8 188C
MDIO User PHY Select Register 1
02C8 1890 - 02C8 1FFF
Reserved
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Peripheral Information and Electrical Specifications
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