Altera 50G Interlaken MegaCore Function User Manual
Page 86
Specification, Revision 1.2. The TX Out-of-Band Flow Control Block Signals for Application Use table
describes the signals on the application side of the TX out-of-band flow control block.
Table 10-2: TX Out-of-Band Flow Control Interface Signals
Signal Name
Direction
Width
(Bits)
Description
fc_clk
Output
1
Output reference clock to an upstream out-of-band RX block.
Clocks the
fc_data
and
fc_sync
signals. You must connect
this signal to a device pin.
fc_data
Output
1
Output serial data pin to an upstream out-of-band RX block.
You must connect this signal to a device pin.
fc_sync
Output
1
Output sync control pin to an upstream out-of-band RX block.
You must connect this signal to a device pin.
Table 10-3: TX Out-of-Band Flow Control Block Signals for Application Use
Signal Name
Direction
Width
(Bits)
Description
double_fc_clk
Input
1
Reference clock for generating the flow control output clock
fc_clk
. The frequency of the
double_fc_clk
clock must be
double the intended frequency of the TX
fc_clk
output clock.
double_fc_
arst
Input
1
Asynchronous reset for the out-of-band TX block.
ena_status
Input
1
Enable transmission of the lane status and link status to the
downstream out-of-band RX block. If this signal is asserted,
the lane and link status information is transmitted on
fc_data
.
If this signal is not asserted, only the calendar information is
transmitted on
fc_data
.
lane_status
Input
Number
of Lanes
Lane status to be transmitted to a downstream out-of-band RX
block if
ena_status
is asserted. Width is the number of lanes.
link_status
Input
1
Link status to be transmitted to a downstream out-of-band RX
block if
ena_status
is asserted.
calendar
Input
16
Calendar status to be transmitted to a downstream out-of-band
RX block.
Related Information
UG-01140
2015.05.04
TX Out‑of‑Band Flow Control Signals
10-3
Out-of-Band Flow Control in the 50G Interlaken MegaCore Function
Altera Corporation