EMAC_TXCLK
EMAC_TXD[0-7]
EMAC_TXEN
EMAC_COL
EMAC_CRS
EMAC_RXCLK
EMAC_RXD[0-7]
EMAC_RXDV
EMAC_RXER
MDIO_MCLK
MDIO_MDIO
Physical
layer
device
(PHY)
System
core
Transformer
2.5 MHz,
25 MHz,
RJ−45
EMAC
MDIO
EMAC_GMTCLK
or 125 MHz
Preliminary
www.ti.com
Architecture
3.2.3 Signal Descriptions
The device supports both MII interface (for 10/100 Mbps operation) and GMII interface (for
10/100/1000 Mbps) operation.
shows a device with integrated EMAC and MDIO interfaced via a GMII connection. This
interface is available in 10 Mbps, 100 Mbps, and 1000 Mbps modes.
The GMII interface supports 10/100/1000 Mbps modes. Only full-duplex mode is available in 1000 Mbps
mode. In 10/100 Mbps modes, the GMII interface acts like an MII interface and only the lower 4 bits of
data are transferred for each of the data buses. The individual EMAC and MDIO signals for the GMII
interface are summarized in
.
Figure 3-2. Ethernet Configuration—GMII Connections
411
SPRUGX9 – 15 April 2011
EMAC/MDIO Module
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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