Altera Triple Speed Ethernet MegaCore Function - Manual (Page 132)

Description I/O Name
125-MHz TBI transmit clock from external SERDES, typically sourced
by the local reference clock oscillator. I
tbi_tx_clk
125-MHz TBI receive clock from external SERDES, typically sourced
by the line clock recovered from the encoded line stream. I
tbi_rx_clk
TBI receive data. This bus carries the data from the external SERDES.
Synchronize the bus with
tbi_rx_clk
. The data can be arbitrary
aligned.
I tbi_rx_d[9:0]
Status LED Control Signals
Table 7-20: Status LED Interface Signals
Description I/O Name
When asserted, this signal indicates a successful link synchronization. O led_link
When asserted, this signal indicates some activities on the transmit
and receive paths. When deasserted, it indicates no traffic on the
paths. O
led_crs
When asserted, this signal indicates that a collision was detected
during frame transmission. This signal is always deasserted when the
PCS function operates in standard 1000BASE-X mode or in full-
duplex mode when SGMII is enabled. O
led_col
Auto-negotiation status. The PCS function asserts this signal when
an auto-negotiation completes. O led_an
10-bit character error. Asserted for one
tbi_rx_clk
cycle when an
erroneous 10-bit character is detected.
O
led_char_err
10-bit running disparity error. Asserted for one
tbi_rx_clk
cycle
when a disparity error is detected. A running disparity error indicates
that more than the previous and perhaps the current received group
had an error.
O
led_disp_err
SERDES Control Signals
Table 7-21: SERDES Control Signal
Description I/O Name
Power-down enable. Asserted when the PCS function is in power-
down mode; deasserted when the PCS function is operating in normal
mode. This signal is implemented only when an external SERDES is
used. O
powerdown
SERDES Loopback Control. Asserted when the PCS function operates
in loopback mode. You can use this signal to configure an external
SERDES device to operate in loopback mode. O
sd_loopback
Altera Corporation Interface Signals
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7-17 Status LED Control Signals
UG-01008
2014.06.30