Device Design Guidelines: Agilex™ 5 FPGAs and SoCs

ID 813741
Date 4/01/2024
Public
Document Table of Contents

5.4.4.1. Optional Configuration Pins

Table 50.  Optional Configuration Pins Checklist
Number Done? Checklist Item
1   Plan the board design to support optional configuration pins as required.

You can enable the following optional configuration pins:

  • OSC_CLK_1—Must be connected to a 25 MHz, 100 MHz, or 125 MHz external source if EMIF and transceiver are used
  • CONF_DONE
  • INIT_DONE
  • CVP_CONFDONE
  • SEU_ERROR
  • HPS_COLD_nRESET
  • Direct to Factory Image
  • nCATTRIP

nCATTRIP

The Catastrophic Trip (nCATTRIP) is an optional signal assignable to any unused SDM_IO pin. When enabled, the nCATTRIP signal de-asserts when core temperature is greater than the pre-defined temperature threshold value. You may assign your preferred temperature threshold value through the Device and Pin Options window of the Quartus® Prime software.

Attention: When nCATTRIP drives LOW, you must immediately power down the FPGA to avoid permanent damage to the device.

To enable the nCATTRIP output, select "USE nCATTRIP output" in the Configuration PIN GUI and assign the appropriate SDM I/O from the pulldown menu.

For more information about nCATTRIP and other optional configuration pins, refer to the Secure Device Manager (SDM) Optional Signal Pins section in Pin Connection Guidelines: Agilex™ 5 FPGAs and SoCs and the Power Management User Guide: Agilex™ 5 FPGAs and SoCs .

GUIDELINE: Ensure that you follow the pull-up recommendations for the nCATTRIP signal to avoid incorrect sampling before you configure your device.

Table 51.  Pull-Up Recommendations
nCATTRIP SDM_IO Assignment Options Internal Pull-Up or Pull-Down External Pull-Up Recommendation
1-7, 9-15 20kΩ pull-up Not required
0, 8, 16 20kΩ pull-down Connect 4.7kΩ to VCCIO_SDM