Intel® Stratix® 10 GX FPGA Development Kit User Guide

ID 683674
Date 4/02/2020
Public
Document Table of Contents

6.3.7. The FMC Tab

This tab allows you to perform loopback tests on the FMC port.

Figure 27. The FMC Tab

The following sections describe controls in the FMC tab.

Status

Displays the following status information during a loopback test:
  • PLL Lock: Shows the PLL locked or unlocked state.
  • Pattern Sync: Shows the pattern synced or not synced state. The pattern is considered synced when the start of he data data sequence is detected.
  • Details: Shows the PLL lock and pattern sync detailed information per channel.

Port

Allows you to specify the interface to test. The following port are available to test:
  • XCVR
  • CMOS

PMA Settings

Allows you to make changes to the PMA parameters that affect the active transceiver interface. The following settings are available for analysis:
  • Serial Loopback: Routes signals between the transmitter and receiver.
  • VOD: Specifies the voltage output differential of the transmitter buffer.
  • Pre-emphasis tap:
    • 1st pre - Specifies the amount of pre-emphasis on the pre-tap of the transmitter buffer.
    • 2nd pre - Specifies the amount of pre-emphasis on the second pre-tap of the transmitter buffer.
    • 1st post - Specifies the amount of pre-emphasis on the first post tap of the transmitter buffer.
    • 2nd post - Specifies the amount of pre-emphasis on the second post tap of the transmitter buffer.
  • Equalizer: Specifies the AC gain setting for the receiver equalizer in four stage mode.
  • DC gain: Specifies the DC gain setting for the receiver equalizer in four stage mode.
  • VGA: Specifies the VGA gain value.
Figure 28. PMA Settings

Data Type

Specifies the type of data contained in the transactions. The following data types are available for analysis.
  • PRBS 7- Selects pseudo-random 7-bit sequences
  • PRBS 15- Selects pseudo-random 15-bit sequences
  • PRBS 23- Selects pseudo-random 23-bit sequences
  • PRBS 31-Selects pseudo-random 31-bit sequences
  • HF- Selects highest frequency divide-by-2 data pattern 10101010
  • LF- Selects lowest frequency divide-by-33 data pattern

Error Control

Displays data errors detected during analysis and allows you to insert errors:
  • Detected errors - Displays the number of data errors detected in the hardware.
  • Inserted errors - Displays the number of errors inserted into the transmit data stream.
  • Insert Error - Inserts a one-word error into the transmit data stream each time you click the button. Insert Error is only enabled during transaction performance analysis.
  • Clear - Resets the Detected error and Inserted error counters to zeroes.

Loopback

Start - Initiates the selected ports transaction performance analysis.
Note: Always click Clear before Start

Stop - Terminates transaction performance analysis.

TX and RX performance bars - Shows the percentage of maximum theoretical data rate that the requested transactions are able to achieve.