Texas Instruments DM6467 Digital Video Evaluation Module TMDXEVM6467T TMDXEVM6467T 데이터 시트
제품 코드
TMDXEVM6467T
SPRS605C – JULY 2009 – REVISED JUNE 2012
7.17
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.
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.
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.
For more detailed information on the MDIO peripheral, see the TMS320DM646x DMSoC Ethernet Media
Access Controller (EMAC)/Management Data Input/Output (MDIO) Module User's Guide (literature
number
Access Controller (EMAC)/Management Data Input/Output (MDIO) Module User's Guide (literature
number
) . For a list of supported registers and register fields, see
, MDIO Registers
in this data manual.
7.17.1
MDIO Peripheral Register Description(s)
Table 7-78. MDIO Registers
HEX ADDRESS RANGE
ACRONYM
REGISTER NAME
0x01C8 4000
VERSION
MDIO version register
0x01C8 4004
CONTROL
MDIO control register
0x01C8 4008
ALIVE
MDIO PHY alive status register
0x01C8 400C
LINK
MDIO PHY link status register
0x01C8 4010
LINKINTRAW
MDIO link status change interrupt (unmasked) register
0x01C8 4014
LINKINTMASKED
MDIO link status change interrupt (masked) register
0x01C8 4018 - 0x01C8 401F
–
Reserved
0x01C8 4020
USERINTRAW
MDIO user command complete interrupt (unmasked) register
0x01C8 4024
USERINTMASKED
MDIO user command complete interrupt (masked) register
0x01C8 4028
USERINTMASKSET
MDIO user command complete interrupt mask set register
0x01C8 402C
USERINTMASKCLEAR
MDIO user command complete interrupt mask clear register
0x01C8 4030 - 0x01C8 407F
–
Reserved
0x01C8 4080
USERACCESS0
MDIO user access register 0
0x01C8 4084
USERPHYSEL0
MDIO user PHY select register 0
0x01C8 4088
USERACCESS1
MDIO user access register 1
0x01C8 408C
USERPHYSEL1
MDIO user PHY select register 1
0x01C8 4090 - 0x01C8 47FF
–
Reserved
Copyright © 2009–2012, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
259
Product Folder Link(s):