Altera SerialLite II IP Core User Manual
Page 84
4–30
Chapter 4: Functional Description
Signals
SerialLite II MegaCore Function
January 2014
Altera Corporation
User Guide
stat_tc_rdp_thresh_breach
Output
tx_coreclock
Indicates that the receiver regular data port
FIFO buffer is breached, transmit flow control
link management packet.
stat_tc_hpp_thresh_breach
Output
tx_coreclock
Indicates that the receiver priority data port
FIFO buffer is breached, transmit flow control
link management packet.
err_tc_roe_rsnd_gt4
Output
tx_coreclock
Indicates that the transmitter has transmitted
a segment four times without receiving an
ACK for that segment. The link is restarted.
stat_tc_roe_timeout
Output
tx_coreclock
Retry-on-error only: Indicates that the
transmitter MegaCore function has timed out
waiting for ACK for a packet. The MegaCore
function sends that packet again.
stat_tc_fc_rdp_retransmit
Output
tx_coreclock
Indicates that the receiver FIFO buffer is still
breached, and the refresh timer has reached
maximum. Retransmitting flow control link
management packet (regular data port).
stat_tc_fc_hpp_retransmit
Output
tx_coreclock
Indicates that the receiver FIFO buffer is still
breached, and the refresh timer has reached
maximum. Retransmitting flow control link
management packet (priority data port).
err_tc_is_drop
Output
tx_coreclock
Indicates that irregular segment received
(segment size boundary violation).
err_tc_lm_fifo_oflw
Output
tx_coreclock
Indicates that the link management FIFO
buffer has overflowed. Link management
packets are lost.
err_rr_rx2txfifo_oflw
Output
rrefclk
Indicates that the receiver to transmitter link
management status information FIFO buffer
has overflowed.
stat_rr_fc_rdp_valid
Output
rrefclk
Indicates that a flow control link management
packet was received (regular data port).
stat_rr_fc_hpp_valid
Output
rrefclk
Indicates that a flow control link management
packet was received (priority data port).
stat_rr_fc_value[7:0]
Output
rrefclk
Indicates that the RAW FC_TIME value is
embedded in the valid flow control link
management packet. Decode with the
stat_rr_fc_rdp_valid
and
stat_rr_fc_hpp_valid
signals.
stat_rr_roe_ack
Output
rrefclk
Indicates that a retry-on-error link
management packet of type ACK was
received.
stat_rr_roe_nack
Output
rrefclk
Indicates that a retry-on-error link
management packet of type NACK was
received.
Note to
:
(1) In broadcast mode, these signals will have the corresponding receiver function number post-fixed. For example, err_rr_crc0 is the CRC error
signal from SerialLite II receiver block 0.
Table 4–10. Troubleshooting Signals (Part 2 of 2)
Signal
Direction
Clock Domain
Description