1.1.1.4.2 PTA Signal Timing vs Coexistence Scenarios

• Scenario 1: Wi-Fi device grants BT device’s request.
  • T1: BT device raises the request by asserting BT_ACTIVE signal and sets BT_PRIORITY level before BT RF active.
  • T2: BT device checks WLAN_ACTIVE signal is low to confirm this request is granted by Wi-Fi device. BT device performs the BT RF activities execution continuously.

• Scenario 2: Wi-Fi device rejects BT device’s request.
  • T2: BT device checks WLAN_ACTIVE signal is high to confirm this request is rejected by Wi-Fi device. BT device stops the ongoing BT RF preparation.
  • T3: BT device de-asserts both BT_ACTIVE and BT_PRIORITY signals after stops the BT RF preparation.

• Scenario 3: Wi-Fi device aborts the ongoing BT RF activity by raising WLAN_ACTIVE signal.
  • T9: BT device aborts the ongoing BT RF activity after detecting the WLAN_ACTIVE signal is asserted.
  • T8: BT device de-asserts both BT_ACTIVE and BT_PRIORITY signals after detecting the WLAN_ACTIVE signal is asserted.

Below table is the summary of these timing values.