Altera RapidIO MegaCore Function - Manual (Page 117)

Chapter 5: Signals 5–3
Physical Layer Signals
August 2014 Altera Corporation RapidIO MegaCore Function
User Guide
Multicast Event Signals
Table 5–5 lists the multicast event signals.
Receive Priority Retry Threshold-Related Signals
Table 5–6 lists signals that are related to the Receive Priority Retry Threshold set in
the RapidIO parameter editor.
packet_retry rxclk
Pulsed high for one clock cycle when a packet-retry control
symbol is being transmitted.
yes
packet_not_accepted rxclk
Pulsed high for one clock cycle when a packet-not-accepted
control symbol is being transmitted.
yes
packet_crc_error rxclk
Pulsed high for one clock cycle when a CRC error is detected in a
received packet.
yes
symbol_error rxclk
Pulsed high for one clock cycle when a corrupted symbol is
received.
yes
port_initialized txclk
This signal indicates that the RapidIO initialization sequence has
completed successfully.
This is a level signal asserted high while the initialization state
machine is in the 1X_MODE, 2X_MODE, or 4X_MODE state, as
described in paragraph 4.6 of Part VI of the RapidIO Specification. yes
port_error txclk
This signal holds the value of the PORT_ERR bit of the Port 0
Error and Status
CSR (offset 0x158) described in Table 6–10 on
page 6–7 .
yes
char_err rxclk
Pulsed for one clock cycle when an invalid character or a valid but
illegal character is detected.
yes
Table 5–4. Status Packet and Error Monitoring (Part 2 of 2)
Output Signal
Clock
Domain
Description
Exported by
Qsys
Table 5–5. Multicast Event Signals
Signal Direction
Clock
Domain
Description
Exported by
Qsys
multicast_event_tx Input txclk
Change the value of this signal to indicate the RapidIO
IP core should transmit a multicast-event control
symbol.
This signal should remain stable for at least 10 txclk
cycles.
yes
multicast_event_rx Output rxclk
Changes value when a multicast-event control
symbol is received.
yes
Table 5–6. Priority Retry Threshold Signals (1) (Part 1 of 2)
Signal Direction Description
Exported by
Qsys
buf_av0 Output Buffers available for priority 0 retry packets. yes
buf_av1 Output Buffers available for priority 1 retry packets. yes
buf_av2 Output Buffers available for priority 2 retry packets. yes