4.9 PTA Function

When the PTA (Packet Traffic Arbitration) function is enabled using the “SPTA” command, three dedicated pins come into play:

• BT_PRIO – This pin is configured as an output, and it serves to request a high-priority action from the WLAN device. When the BT_PRIO pin is activated, it signals the WLAN device to give priority to Bluetooth operations.
• BT_ACT – Similar to BT_PRIO, this pin is also configured as an output. When a BT request is granted and Bluetooth activity occupies the RF (Radio Frequency) resource, the BT_ACT pin is pulled high. This indicates that Bluetooth is currently active and using the RF resources.
• WLAN_ACT – This pin is configured as an input, and its purpose is to receive the status of WLAN device activity. It provides information about whether the WLAN device is active or not.