Table 13.
Core Interface Parameters
Parameter
Range
Description
General Core Interface Options
Enable TX fast
pipeline registers
On/Off
Enables the optional fast pipeline registers in the TX parallel datapath. The
fast pipeline registers are hyper-registers, which are clocked by the
tx_coreclkin
input. You must clear fast pipeline registers synchronously.
Enable this option to achieve better setup time for TX parallel data transfer
from the FPGA core to the transceiver.
Enable RX fast
pipeline registers
On/Off
Enables the optional fast pipeline registers in the RX parallel datapath. The
fast pipeline registers are hyper-registers, which are clocked by the
rx_coreclkin
input. You must clear fast pipeline registers synchronously.
Enable this option to achieve better setup time for RX parallel data transfer
from the transceiver to the FPGA core.
TX Core Interface FIFO
Enable TX double
width transfer
On/Off
Enables or disables the TX transfer interface FIFO double width mode. Use
this option when you need to divide the core frequency by two so as not to
exceed the maximum EMIB frequency specifications. In duplex mode, select
this parameter for both TX and RX simultaneously.
RX Core Interface FIFO
Enable RX double
width transfer
On/Off
Enables or disables the RX transfer interface FIFO double width mode. Use
this option when you need to divide the core frequency by two so as not to
exceed the maximum EMIB frequency specifications. In duplex mode, select
this parameter for both TX and RX simultaneously.
2.2.3.2. TX Clock Options
Table 14.
TX Clock Options
Parameter
Range
Description
Selected
tx_clkout clock
source
Full-rate, half-
rate, div66
Specifies the clock source for the
tx_clkout
output clock.
Enable
tx_clkout2 port
On/Off
Enables the optional
tx_clkout2
output clock.
Selected
tx_clkout2 clock
source
Full-rate, half-
rate, div66
Specifies the clock source for
tx_clkout2
output clock after enabling the
tx_clkout2
port.
Selected
tx_coreclkin
clock network
Dedicated Clock
Global Clock
Specifies the type of clock network to route the clock signal to the
tx_coreclkin
port. Dedicated Clock allows a higher maximum frequency
(fmax) between the FPGA core and the transceiver. The number of dedicated
clock lines are limited.
Enable
tx_coreclkin2
port
On/Off
Enables the optional
tx_coreclkin2
input clock.
Selected
tx_coreclkin2
clock network
Dedicated Clock
Global Clock
Specifies the type of clock network to route the clock signal to the
tx_coreclkin2
port. Dedicated Clock allows a higher maximum frequency
(fmax) between the FPGA core and the transceiver. The number of dedicated
clock lines are limited.
Enable external
clock mode
On/Off
Enables or disables the
tx_coreclkin2
input clock to drive the transfer
clock.
2. Implementing the Transceiver PHY Layer in Intel Stratix 10 Devices
UG-20056 | 2019.02.04
Intel
®
Stratix
®
10 E-Tile Transceiver PHY User Guide
35