Altera Interlaken MegaCore Function - Manual (Page 61)

Chapter 5: Signals 5–9
Out-of-Band Flow Control Interface Signals
June 2012 Altera Corporation Interlaken MegaCore Function
User Guide
rx_oob_in_fc_data Input
Input serial data pin from an upstream out-of-band TX block. You
must connect this signal to a device pin.
rx_oob_in_fc_sync Input
Input sync control pin from an upstream out-of-band TX block. You
must connect this signal to a device pin.
Note to Table 5–9 :
(1) The maximum rx_oob_in_clk frequency allowed by the Interlaken specification is 100 MHz. Altera recommends that you run the
rx_oob_in_clk clock at 100 MHz.
Table 5–9. RX Out-of-Band Flow Control Interface Signals (Part 2 of 2)
Signal Direction Description
Table 5–10. RX Out-of-Band Flow Control Block Signals for Application Use
Signal Direction Description
rx_oob_in_sys_clk (1) Input
Reference clock for capturing RX calendar, lane status, and link
status. Frequency must be at least double the frequency of
rx_oob_in_fc_clk
.
rx_oob_in_sys_arst Input Asynchronous reset for the out-of-band RX block.
rx_oob_out_status_update Output
Indicates a new value without CRC-4 errors is present on at least one
of rx_oob_out_lane_status or rx_oob_out_link_status in the
current rx_oob_in_sys_clk cycle. The value is ready to be read by
the application logic.
rx_oob_out_lane_status[L:0] Output
Lane status bits received from an upstream out-of-band TX block on
rc_oob_in_fc_data
.
Width is the number of lanes (L = num_lanes – 1).
rx_oob_out_link_status Output
Link status bit received from an upstream out-of-band TX block on
rc_oob_in_fc_data
.
rx_oob_out_status_error Output
Indicates corrupt lane or link status. A new value is present on at least
one of rx_oob_out_lane_status or rx_oob_out_link_status
in the current rx_oob_in_sys_clk cycle, but the value has at least
one CRC-4 error.
rx_oob_out_calendar[15:0] Output
Calendar bits received from an upstream out-of-band TX block on
rc_oob_in_fc_data
.
rx_oob_out_calendar_update Output
Indicates a new value without CRC-4 errors is present on
rx_oob_out_calendar
in the current rx_oob_in_sys_clk cycle.
The value is ready to be read by the application logic.
rx_oob_out_calendar_error Output
Indicates corrupt calendar bits. A new value is present on
rx_oob_out_calendar
in the current rx_oob_in_sys_clk cycle,
but the value has at least one CRC-4 error.
Note to Table 5–10 :
(1) Altera recommends that you run rx_oob_in_sys_clk at 200 MHz, to support the recommended (and maximum allowed) rx_oob_in_fc_clk
frequency of 100 MHz.