Mii/gmii/rgmii signals – Altera Triple Speed Ethernet MegaCore Function User Manual
Page 124
Description
I/O
Name
Assert this active-low signal to put the node into a power-down state.
If magic packets are supported (the
MAGIC_ENA
bit in the
command_
config
register is set to 1), the receiver logic stops writing data to the
receive FIFO buffer and the magic packet detection logic is enabled.
Setting this signal to 1 restores the normal frame reception mode.
This signal is present only if the Enable magic packet detection option
is turned on.
I
magic_slee
p_n
If the MAC function is in the power-down state, the MAC function
asserts this signal to indicate that a magic packet has been detected
and the node is requested to restore its normal frame reception mode.
This signal is present only if the Enable magic packet detection option
is turned on.
0
magic_wakeup
MII/GMII/RGMII Signals
Table 7-10: GMII/RGMII/MII Signals
Description
I/O
Name
GMII Transmit
GMII transmit data bus.
I
gm_tx_d[7:0]
Asserted to indicate that the data on the GMII transmit data bus is
valid.
O
gm_tx_en
Asserted to indicate to the PHY that the frame sent is invalid.
O
gm_tx_err
GMII Receive
GMII receive data bus.
I
gm_rx_d[7:0]
Assert this signal to indicate that the data on the GMII 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.
I
gm_rx_dv
The PHY asserts this signal to indicate that the receive frame contains
errors.
I
gm_rx_err
RGMII Transmit
RGMII transmit data bus. Drives
gm_tx_d[3:0]
on the positive edge
of
tx_clk
and
gm_tx_d[7:4]
on the negative edge of
tx_clk
.
O
rgmii_out[3:0]
Control output signal. Drives
gm_tx_en
on the positive edge of
tx_clk
and a logical derivative of (
gm_tx_en XOR gm_tx_err)
on the negative
edge of
tx_clk
.
O
tx_control
RGMII Receive
RGMII receive data bus. Expects
gm_rx_d[3:0]
on the positive edge
of
rx_clk
and
gm_rx_d[7:4]
on the negative edge of
rx_clk
.
I
rgmii_in[3:0]
Altera Corporation
Interface Signals
7-9
MII/GMII/RGMII Signals
UG-01008
2014.06.30