Hard Processor System Technical Reference Manual: Agilex™ 3 SoCs

ID 848530
Date 6/23/2025
Public
Document Table of Contents

7.6.12. PSI Clock Group (to the SDM)

The PSI clock tree has a ping-pong counter and a clock gate as shown in the following diagram.

Figure 266. PSI Clock Group (to the SDM) Block Diagram

The following table shows the registers used to program the clocks.

Table 319.  Programming Clock Registers
Clock Name *.src *.cnt (n+1 divider) *.div (2^n divider) Clock Gate (enable)
psi_ref_clk

ctlgrp.psirefctr.src

= 0 (Main_PLL_C1)

= 1 (Peri_PLL_C3)

ctlgrp.psirefctr.cnt --- perpllgrp.en.psiclken