Arria V Hard Processor System Technical Reference Manual

ID 683011
Date 12/02/2022
Public
Document Table of Contents

7.3.5. Resets

The reset manager provides the scan_manager_rst_n reset signal to the scan manager for both cold and warm resets.

Because glitches can happen on the output clocks during a warm reset, the scan manager temporarily stops generation of the JTAG-AP and I/O configuration clocks. This action ensures that a warm reset does not cause output clock glitches.

Before asserting warm reset, the reset manager sends a request to the scan manager. The scan manager stops the output clock generation and acknowledges the reset manager. The reset manager then issues the warm reset. To enable this warm reset handshake, configure the scanmgrhsen bit of the reset manager ctrl register.