Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

7.3.4. Clocks

The scan manager is connected to the spi_m_clk clock generated by the clock manager.

The scan manager generates two clocks. One clock routes to the control block of the FPGA portion of the SoC device with a frequency of spi_m_clk / 6 and runs at a maximum of 33 MHz. The other clock routes to the HPS I/O scan chains with a frequency of sp i_m_clk / 2 and runs at a maximum frequency of 100 MHz.

Note: The spi_m_clk can potentially run faster than the scan manager supports so that SPI masters can support 60 Mbps rates. When the SPI master is running faster than what is supported by the scan manager, the scan manager cannot be used and must be held in reset.