Device Family: Arria® V ST

Device Family: Arria® V SX

Device Family: Cyclone® V SE

Device Family: Cyclone® V ST

Device Family: Cyclone® V SX

Type: Answers

Area: Embedded



Which clock is the reference clock for HPS Ethernet MDC clock?

Description

The correct reference clock for HPS Ethernet clock is l4_mp_clk.

The V HPS Address Map, emac->gmacgrp->GMII_Address->cr incorrectly states the CSR clock range selection determines the frequency of MDC clock according to l3_sp_clk frequency.

The correct reference clock for HPS Ethernet clock is l4_mp_clk.

Workaround/Fix

This problem will be resolved in a future update to the HPS Address Map.