diff --git a/src/portable/synopsys/dwc2/hcd_dwc2.c b/src/portable/synopsys/dwc2/hcd_dwc2.c index 7cbef05b7..6f7551ed7 100644 --- a/src/portable/synopsys/dwc2/hcd_dwc2.c +++ b/src/portable/synopsys/dwc2/hcd_dwc2.c @@ -1242,9 +1242,9 @@ static void port0_enable(dwc2_regs_t* dwc2, tusb_speed_t speed) { uint32_t hfir = dwc2->hfir & ~HFIR_FRIVL_Msk; if (speed == TUSB_SPEED_HIGH) { - hfir |= 125*phy_clock; + hfir |= 125*phy_clock - 1; // The "- 1" is the correct value. The Synopsys databook was corrected in 3.30a } else { - hfir |= 1000*phy_clock; + hfir |= 1000*phy_clock - 1; } dwc2->hfir = hfir;