HS_ENABLE
mtu3_clrbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);