Stratix® 10 Hard Processor System Technical Reference Manual

ID 683222
Date 8/15/2024
Public
Document Table of Contents

17.7.9.3. Generating an Interrupt without Affecting the PPS

Bits [6:5], TRGTMODSEL, of Register 459 (PPS Control Register) enable you to program the Target Time registers (register 455 and 456) to do any one of the following: †

  • Generate only interrupts. †
  • Generate interrupts and the PPS start and stop time. †
  • Generate only PPS start and stop time. †

To program the Target Time registers (register 455 and 456) to generate only interrupt events: †

  1. Program 00 (for interrupt) in Bits [6:5], TRGTMODSEL, of Register 459 (PPS Control Register) to instruct the MAC to use the Target Time registers (register 455 and 456) for the target time interrupt. †
  2. Program a target time value in the Target Time registers (register 455 and 456) to instruct the MAC to generate an interrupt when the target time elapses. If Bits [6:5], TRGTMODSEL, are changed (for example, to control the PPS), then the interrupt generation is overwritten with the new mode and new programmed Target Time register value.