
Chapter 12: Stratix V Transceiver Native PHY IP Core 12–9
PMA Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Table 12–8 lists the best case latency for the most significant bit of a word for the RX
deserializer for the PMA Direct datapath. For example, for an 8-bit interface width,
the latencies in UI are 11 for bit 7, 12 for bit 6, 13 for bit 5, and so on.
Enable tx_pma_qpipullup port
(QPI)
On/Off
When you turn this option On, the core includes
tx_pma_qpipullup
control input port. This port is only used for
QPI applications.
Enable tx_pma_qpipulldn port
(QPI)
On/Off
When you turn this option On, the core includes
tx_pma_qpipulldn
control input port. This port is only used for
QPI applications.
Enable tx_pma_txdetectrx port
(QPI)
On/Off
When you turn this option On, the core includes
tx_pma_txdetectrx
control input port. This port is only used
for QPI applications. The RX detect block in the TX PMA detects
the presence of a receiver at the other end of the channel. After
receiving a
tx_pma_txdetectrx
request, the receiver detect
block initiates the detection process.
Enable tx_pma_rxfound port
(QPI)
On/Off
When you turn this option On, the core includes
tx_pma_rxfound
output status port. This port is only used for
QPI applications. The RX detect block in the TX PMA detects the
presence of a receiver at the other end of the channel.
tx_pma_rxfound
indicates the result of detection.
Enable rx_pma_qpipulldn port
(QPI)
On/Off
When you turn this option On, the core includes the
rx_pma_qpipulldn
port. This port is only used for QPI
applications.
Enable rx_pma_clkout port On/Off
When you turn this option On, the RX parallel clock which is
recovered from the serial received data is an output of the PMA.
Enable rx_is_lockedtodata port On/Off
When you turn this option On, the
rx_is_lockedtodata
port is
an output of the PMA.
Enable rx_is_lockedtoref port On/Off
When you turn this option On, the
rx_is_lockedtoref
port is
an output of the PMA.
Enable rx_set_lockedtodata and
rx_set_locktoref ports
On/Off
When you turn this option On, the
rx_set_lockedtdata
and
rx_set_lockedtoref
ports are outputs of the PMA.
Enable rx_pma_bitslip_port On/Off
When you turn this option On, the
rx_pma_bitslip
is an input
to the core. The deserializer slips one clock edge each time this
signal is asserted. You can use this feature to minimize
uncertainty in the serialization process as required by protocols
that require a datapath with deterministic latency such as CPRI.
Enable rx_seriallpbken port On/Off
When you turn this option On, the
rx_seriallpbken
is an input
to the core. When your drive a 1 on this input port, the PMA
operates in loopback mode with TX data looped back to the RX
channel.
Table 12–7. RX PMA Parameters (Part 2 of 2)
Parameter Range Description
Table 12–8. Latency for RX Deserialization in Stratix V Devices (Part 1 of 2)
FPGA Fabric Interface Width Stratix V Latency in UI
8 bits 11
10 bits 13
16 bits 19
Kommentare zu diesen Handbüchern