Altera 40-Gbps Ethernet MAC and PHY MegaCore Function - Manual (Page 102)

Signal Name Direction Description
pcs_rx_arst_ST Input PHY PCS RX asynchronous reset signal
pcs_tx_arst_ST
Input PHY PCS TX asynchronous reset signal
pma_arst_ST
Input PHY PMA asynchronous reset signal
Note: In any MAC and PHY variation, when you reset the TX MAC you must also reset the TX PCS to
avoid transmitting corrupted packets. Therefore, Altera recommends that you reset the IP core
with the following conditions:
• Reset the TX MAC and the TX PCS together (assert
pcs_tx_arst_ST
and
mac_tx_arst_ST
simultaneously).
• Release
pcs_tx_arst_ST
and
mac_tx_arst_ST
simultaneously or release
pcs_tx_arst_ST
after
you release
mac_tx_arst_ST
.
Altera recommends that you release all parts of the 40-100GbE IP core from reset simultaneously.
Note: Each reset signal must be asserted for at least one
clk_status
cycle.
You should not release any reset signal until after you observe that the reference clock is stable. If
the reference clock is generated from an fPLL, wait until after the fPLL locks.
Related Information
MAC and PHY Reset Registers on page 3-89
For information about the IP core reset registers, including the recommended reset sequence. Use the
reset registers for dynamic reset during operation.
Signals
This section lists the external signals of the different 40-100GbE IP core variations.
Signals of MAC and PHY Variations Without Adapters on page 3-55
Signals of MAC and PHY Variations With Adapters on page 3-66
Signals of 40-100GbE MAC-Only IP Core Variations on page 3-68
Signals of 40-100GbE PHY-Only IP Core Variations on page 3-72
Signals of MAC and PHY Variations Without Adapters
The signals of the MAC and PHY variations without adapters are described in the following formats:
• The figure identifies the IP core interfaces and the presence or absence of various signals in MAC and
PHY, PHY-only, and MAC-only IP core variations.
• The tables identify the different signals available in TX-only, RX-only, and duplex IP core variations.
• Links guide you to descriptions for the individual signals, by interface. The links are available only if
you are viewing this topic in the context of the Functional Description chapter of the 40- and 100-Gbps
Ethernet MAC and PHY MegaCore Function User Guide.
UG-01088
2014.12.15
Signals 3-55
Functional Description Altera Corporation
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