Altera 50G Interlaken MegaCore Function User Manual
Page 49
Signal Name
Direction
Width
(Bits)
Description
reset_n
Input
1
Active-low reset signal for the 50G Interlaken IP core.
Altera recommends that you hold this signal low for at
least the duration of two
mm_clk
cycles, to ensure the reset
sequence proceeds correctly.
reconfig_reset
Input
1
Reset signal for the Arria 10 transceiver reconfiguration
interface. This signal is available only in IP core variations
that target an Arria 10 device.
srst_tx_common
Output
1
Synchronous reset signal that the IP core asserts high
while the transmitter is initializing. This signal is synchro‐
nous with
clk_tx_common
.
This signal goes low to indicate that the transceiver PLL
has locked to the reference clock. The TX PCS and the TX
MAC are held in reset while the
srst_tx_common
clock is
asserted. You can use this signal for diagnostic purposes.
srst_rx_common
Output
1
Synchronous reset that is active at startup. This signal is
synchronous with
clk_rx_common
. This signal goes low to
indicate that the transceiver PLL has achieved lock and the
recovered clock has locked to data in normal operation,
this signal is deasserted after the transceiver completes its
reset sequence. The RX PCS and the RX MAC are held in
reset while the
srst_rx_common
clock is asserted. This
signal is also active in the event of a serious clock data
recovery failure on any of the RX lanes.
tx_usr_srst
Output
1
Transmit side reset output signal. Indicates the transmit
side user data interface is resetting. This signal is synchro‐
nous with
tx_usr_clk.
Your application can use this
signal to reset any status counters you may maintain in the
tx_usr_clk
domain.
rx_usr_srst
Output
1
Receive side reset output signal. Indicates the receive side
user data interface is resetting. This signal is synchronous
with
rx_usr_clk.
Your application can use this signal to
reset any status counters you may maintain in the
rx_
usr_clk
domain.
UG-01140
2015.05.04
50G Interlaken IP Core Reset Interface Signals
5-3
50G Interlaken MegaCore Function Signals
Altera Corporation