Altera Transceiver PHY IP Core - Manual (Page 498)

Parameter Range Description
Enable TX 8B/10B disparity
control
On/Off When you turn this option On, the PCS includes
disparity control for the 8B/10B encoder. You
force the disparity of the 8B/10B encoder using
the
tx_forcedisp
and
tx_dispval
control
signal.
Enable RX 8B/10B decoder On/Off When you turn this option On, the PCS includes
the 8B/10B decoder.
Related Information
Transceiver Architecture in Cyclone V Devices
Rate Match FIFO
The rate match FIFO compensates for the very small frequency differences between the local system clock
and the RX recovered clock.
For more information refer to the Rate Match FIFO sections in the Transceiver Architecture in Cyclone V
Devices.
Table 15-12: Rate Match FIFO Parameters
Parameter Range Description
Enable RX rate match FIFO On/Off When you turn this option On,
the PCS includes a FIFO to
compensate for the very small
frequency differences between
the local system clock and the
RX recovered clock.
RX rate match insert/delete +ve
pattern (hex)
User-specified 20 bit pattern Specifies the +ve (positive)
disparity value for the RX rate
match FIFO as a hexadecimal
string.
RX rate match insert/delete -ve
pattern (hex)
User-specified 20 bit pattern Specifies the -ve (negative)
disparity value for the RX rate
match FIFO as a hexadecimal
string.
When you enable the simplified data interface and enable the rate match FIFO status ports, the rate match
FIFO bits map to the high-order bits of the data bus as listed in the following table. This table uses the
following definitions:
• Basic double width: The Standard PCS protocol mode GUI option is set to basic. The FPGA data
width is twice the PCS data width to allow the fabric to run at half the PCS frequency.
• Serial TM RapidIO double width: You are implementing the Serial RapidIO protocol. The FPGA data
width is twice the PCS data width to allow the fabric to run at half the PCS frequency.
UG-01080
2015.01.19
Rate Match FIFO 15-15
Cyclone V Transceiver Native PHY IP Core Overview Altera Corporation
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