Intel® Arria® 10 Hard Processor System Technical Reference Manual

ID 683711
Date 8/28/2023
Public
Document Table of Contents

4.1. Reset Manager Block Diagram and System Integration

The reset manager accepts reset requests from the security manager, FPGA control block, FPGA core, modules in the HPS, and reset pins and generates module reset signals. The reset manager receives security status from the security manager. The reset manager also has warm reset handshaking signals to support system reset behavior, clock manager interfaces, and the Anti-Tamper interface with security manager. The Boot clock (boot_clk) is used as the default clock for both cold or warm reset. When the device is configured to operate in secure mode, boot_clk is cb_intosc_hs_div2_clk. When the device is not in secure mode, boot_clk is sourced from the external oscillator input pin, HPS_CLK1.

The following figure shows a block diagram of the reset manager in the SoC device. For clarity, reset-related handshaking signals to other HPS modules and to the clock manager module are omitted.

Figure 9. Reset Manager Block Diagram