Altera Triple Speed Ethernet MegaCore Function Bedienungsanleitung Seite 125

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DescriptionI/OName
RGMII control input signal. Expects gm_rx_dv on the positive edge of
rx_clk and a logical derivative of (gm_rx_dv XOR gm_rx_err) on the
negative edge of rx_clk.
Irx_control
MII Transmit
MII transmit data bus.Om_tx_d[3:0]
Asserted to indicate that the data on the MII transmit data bus is valid.Om_tx_en
Asserted to indicate to the PHY device that the frame sent is invalid.Om_tx_err
MII Receive
MII receive data bus.Im_rx_d[3:0]
Assert this signal to indicate that the data on the MII receive data bus
is valid. Keep this signal asserted during frame reception, from the first
preamble byte until the last byte of the CRC field is received.
Im_rx_en
The PHY asserts this signal to Indicate that the receive frame contains
errors.
Im_rx_err
MII PHY Status
Collision detection. The PHY asserts this signal to indicate a collision
during frame transmission. This signal is not used in full- duplex or
gigabit mode.
Im_rx_col
Carrier sense detection. The PHY asserts this signal to indicate that it
has detected transmit or receive activity on the Ethernet line. This
signal is not used in full-duplex or gigabit mode.
Im_rx_crs
PHY Management Signals
Table 7-11: PHY Management Interface Signals
DescriptionI/OName
Management data input.Imdio_in
Management data output.Omdio_out
An active-low signal that enables mdio_in or mdio_out. For more
information about the MDIO connection, refer to MDIO Connection
on page 4-21.
Omdio_oen
Management data clock. Generated from the Avalon-MM interface
clock signal, clk. Specify the division factor using the Host clock
divisor parameter such that the frequency of this clock does not exceed
2.5 MHz. For more information about the parameters, refer to Ethernet
MAC Options on page 3-2.
A data bit is shifted in/out on each rising edge of this clock. All fields
are shifted in and out starting from the most significant bit.
Omdc
Interface Signals
Altera Corporation
Send Feedback
UG-01008
PHY Management Signals
7-10
2014.06.30
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