F-Tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 10/02/2023
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3.3.8. Analog Parameter Options

Transceiver analog parameter settings are used to tune the analog functions in the FGT and FHT PMAs while designing high-speed serial protocol solutions. You can use this feature to compensate for signal losses for high data rate communication.

Until the Intel® Quartus® Prime Pro Edition software release 23.2, you had to set the analog parameters in the F-Tile PMA/FEC Direct PHY Intel® FPGA IP using .qsf assignments for your design. If you did not provide these settings in the design .qsf file, then the Intel® Quartus® Prime Pro Edition software would select a valid value during Support-Logic Generation that may not be the most appropriate for your board. The Intel® Quartus® Prime Pro Edition software would also generate a critical warning to remind you to set the parameters in your design .qsf file.

To ensure consistency and ease of use, beginning in Intel® Quartus® Prime Pro Edition software release 23.3, these settings are available in the Analog Parameters tab of the F-Tile PMA/FEC Direct PHY Intel® FPGA IP GUI.
Note: The design level HSSI_PARAMETER settings in the .qsf file take precedence over the Analog Parameters GUI settings.
Note: The Analog Parameters GUI settings support for the F-Tile PMA/FEC Direct PHY Multirate Intel® FPGA IP is planned in a future release of the Intel® Quartus® Prime Pro Edition software.
Figure 73. Analog Parameter Options for FGT PMA in Parameter Editor
Table 38.  FGT TX Equalization (EQ) Analog Parameter Options
Parameter Values Description
FGT TXEQ Post Tap 1, 1.0 step size 0 to 19 Options for FGT TX EQ Post Tap 1, in 1.0 step size increments. Default value is 0.
FGT TXEQ Pre Tap 1, 1.0 step size 0 to 15 Options for FGT TX EQ Pre Tap 1, in 1.0 step size increments. Default value is 5.
FGT TXEQ Pre Tap 2, 1.0 step size 0 to 7

Options for FGT TX EQ Pre Tap 2, in 1.0 step size increments. Default value is 0.

FGT TXEQ Main Tap, 1.0 step size 0 to 55 Options for FGT TX EQ Main Tap, in 1.0 step size increments. Default value is 35.
Table 39.  FGT RX Analog Parameter Options
Parameter Values Description
Select FGT RX Onchip Termination RX_ONCHIP_TERMINATION_R_1(85 Ohms)

RX_ONCHIP_TERMINATION_R_2(100 ohms)

Selects FGT RX termination resistor setting. Default value is RX_ONCHIP_TERMINATION_R_1(85 Ohms).
Enable FGT RX AC Couple DISABLE

ENABLE

Enable RX external AC coupling setting. Default value is ENABLE.
Enable FGT VSR mode VSR_MODE_LOW_LOSS

VSR_MODE_HIGH_LOSS

VSR_MODE_DISABLE

Enable VSR mode setting. Default value is VSR_MODE_LOW_LOSS.
RXEQ VGA Gain 0 to 63 Options for RX EQ VGA gain value, in 1.0 step size increments. Default value is 0.
Note: This parameter is only available when the Adaptation mode is set to manual in RX Datapath Options.
RXEQ High Frequency Boost 0 to 63 Options for RX EQ high frequency boost value, in 1.0 step size increments. Default value is 0.
Note: This parameter is only available when the Adaptation mode is set to manual in RX Datapath Options.
RXEQ DFE Data Tap1 0 to 63 Options for RX EQ DFE data tap1 value, in 1.0 step size increments. Default value is 0.
Note: This parameter is only available when the Adaptation mode is set to manual in RX Datapath Options.
Figure 74. Analog Parameter Options for FHT PMA in Parameter Editor
Table 40.  FHT TX Analog Parameter Options
Parameter Values Description
Enable FHT TX P&N Invert Disabled

Enabled

Enable FHT TX P and N inversion. Default value is Disabled.
Enable FHT TXOUT Tristate Disabled

Enabled

Enable tristate on FHT TX serial outputs. Default value is Disabled.
Select FHT TX Termination TXTERM_OFFSET_P0(90 Ohms)

TXTERM_OFFSET_M1(96.8 Ohms)

Selects FHT TX termination resistor setting. Default value is TXTERM_OFFSET_P0(90 Ohms).
Table 41.  FHT RX Analog Parameter Options
Parameter Values Description
Enable FHT RX P&N Invert Disabled

Enabled

Enable FHT RX P and N inversion. Default value is Disabled.
Select FHT RX Termination RXTERM_OFFSET_P0(90 Ohms)

RXTERM_OFFSET_P2(94.6 Ohms)

RXTERM_OFFSET_P3(97.7 Ohms)

RXTERM_OFFSET_P4(100 Ohms)

RXTERM_OFFSET_P5(102.3 Ohms)

RXTERM_OFFSET_P6(105.4 Ohms)

RXTERM_OFFSET_P7(107.7 Ohms)

RXTERM_OFFSET_P8(110 Ohms)

RXTERM_OFFSET_M4(80.8 Ohms)

RXTERM_OFFSET_M5(83.1 Ohms)

RXTERM_OFFSET_M6(85.4 Ohms)

RXTERM_OFFSET_M7(87.7 Ohms)

Selects FHT RX termination resistor setting. Default value is RXTERM_OFFSET_P0(90 Ohms).
Table 42.  FHT PLL Analog Parameter Option
Parameter Values Description
Select FHT external AC Cap EXTERNAL_AC_CAP_ENABLE

EXTERNAL_AC_CAP_DISABLE

Enable external AC coupling capacitance. Default value is EXTERNAL_AC_CAP_ENABLE.
Table 43.  FHT TX Equalization (EQ) Analog Parameter Options
Parameter Values Description

Post-Cursor 4, 0.25 step size

-8.0 to +7.75 FHT post tap 4 coefficients, 0.25 step size. Default value is 0.0.
Post-Cursor 3, 0.25 step size -8.0 to +7.75 FHT post tap 3 coefficients, 0.25 step size. Default value is 0.0.
Post-Cursor 2, 0.25 step size -8.0 to +7.75 FHT post tap 2 coefficients, 0.25 step size. Default value is 0.0.
Post-Cursor 1, 0.5 step size -16.0 to +15.5 FHT post tap 1 coefficient, 0.5 step size. Default value is 0.0.
Main-Cursor,0.5 step size 0.0 to 41.5 FHT main tap coefficient, 0.5 step size. Default value is 41.5.
Pre-Cursor 1,0.5 step size -16.0 to +15.5 FHT pre tap 1 coefficient, 0.5 step size. Default value is 0.0.
Pre-Cursor 2,0.25 step size -8.0 to +7.75 FHT pre tap 2 coefficients, 0.25 step size. Default value is 0.0.
Pre-Cursor 3,0.25 step size -8.0 to +7.75 FHT pre tap 3 coefficients, 0.25 step size. Default value is 0.0.