
reconfig_clk, and reconfig_busy—are not present in variations targeting Stratix V devices with GX
transceivers.
1.25 Gbps Serial Interface
If the variant includes an embedded PMA, the PMA provides a 1.25-GHz serial interface.
Table 7-25: 1.25 Gbps MDI Interface Signals
DescriptionI/OName
125 MHz local reference clock oscillator.Iref_clk
Serial Differential Receive Interface.Irx_p
Serial Differential Transmit Interface.Otx_p
Transceiver Native PHY Signal
Table 7-26: Transceiver Native PHY Signal
DescriptionI/OName
Port to connect the RX PLL reference clock with a frequency of 125
MHz when you enable SyncE support.
Icdr_ref_clk_n
SERDES Control Signals
These signals apply only to PMA blocks implemented in devices with GX transceivers.
Table 7-27: SERDES Control Signal
DescriptionI/OName
Recovered clock from the PMA block.Orx_recovclkout
Power-down status. 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 internal SERDES is
used with the option to export the power-down signal.
This signal is not present in PMA blocks implemented in Stratix V
devices with GX transceivers.
Opcs_pwrdn_out
Power-down enable. Assert this signal to power down the transceiver
quad block. This signal is implemented only when an internal
SERDES is used with the option to export the power-down signal.
This signal is not present in PMA blocks implemented in Stratix V
devices with GX transceivers.
Igxb_pwrdn_in
Calibration block clock for the ALT2GXB module (SERDES). This
clock is typically tied to the 125 MHz ref_clk. Only implemented
when an internal SERDES is used.
This signal is not present in PMA blocks implemented in Stratix V
devices with GX transceivers.
Igxb_cal_blk_clk
Altera Corporation
Interface Signals
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1.25 Gbps Serial Interface
UG-01008
2014.06.30
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