Question about using POWER-Z KT001 to test CCG3PA

[NiLi_2861801]

Hi,

    CYPD3171-24LQXQ, choose "Apple 2.4A enable" YES in Configuration Utility.

    Then, When I use Power-z KT001 auto enumerate charging protocol, or test Apple 2.4A, VBUS will always down for nearly 200ms.  Why?

     Thanks.

            /*

             * VBUS shall be disabled in this state only if:

             * 1) TYPE-C port entered legacy charging mode from PD state.

             * 2) Apple charging selected.

             */

            if (((bc_stat->connected == false) && (cport == TYPEC_PORT_0_IDX)) ||

                    ((pd_get_ptr_chg_cfg_tbl(cport)->src_sel & BC_SRC_APPLE_MODE_ENABLE_MASK) != 0))

            {

#if LEGACY_PD_PARALLEL_OPER

                /* Toggle VBUS only if we came here after disabling PD mode. */

                if (!((cport == TYPEC_PORT_0_IDX) && (dpm_get_info(cport)->pd_disabled == false)))

#endif /* LEGACY_PD_PARALLEL_OPER */

                {

                    psrc_disable(cport, NULL);

                    vbus_discharge_on(cport);

                    timer_start(cport, APP_BC_GENERIC_TIMER1, APP_BC_VBUS_CYCLE_TIMER_PERIOD, bc_tmr_cbk);

                }

#if LEGACY_PD_PARALLEL_OPER

                /* We came here after TYPE-C attach. Configure VDP_SRC detect comparator. */

                else

                {

                    bc_set_bc_evt (cport, BC_EVT_TIMEOUT2);

                }

#endif /* LEGACY_PD_PARALLEL_OPER */

            }