simultaneous ble and 5ghz wifi

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cakr_2329926
Level 1
Level 1

We use a BCM43340 chip and are in the process of implementing bluetooth connection through WICED 3.7.0-7.  In the datasheet for the part, on page 115, it states that "The BCM43340 does not provide simultaneous 2.4 GHz and 5 GHz operation".  Since the BLE is housed in the 2.4GHz portion of the chip, does this statement mean that BLE cannot be used if using a 5GHz AP for wifi access?

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carson.krupp_2329926​  rroy

I checked internally with the WiFi Combo chip product team and it appears that all of our current combo devices (ex. CYW43455 and others) leverage a seperate PHY, MAC and shared antenna, so 5GHz WLAN and 2.4GHz BT simultaneously is indeed possible (i.e. 5G softAP with BLE).

We have a device coming out later in the year which can take advantage of a dual antenna path and LNAs, and this will be optimal for 2.4GHz WLAN and simultaneous BT.

Remember though that the original question references 5GHz WLAN and 2.4GHz BT simultaneously – not 2.4GHz WLAN and 5GHz WLAN – that’s only possible with RSDB.

Hope this helps.

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RaktimR_11
Moderator
Moderator
Moderator
500 replies posted 250 replies posted 100 replies posted

Your understanding is correct. The datasheet and schematic seem to indicate that BLE cannot be used if using a 5 GHz AP for wifi access. One way to validate this is by testing the ble_wifi_introducer App where you connect to a 5 GHz AP and check the connection is maintained or not.

carson.krupp_2329926​  rroy

I checked internally with the WiFi Combo chip product team and it appears that all of our current combo devices (ex. CYW43455 and others) leverage a seperate PHY, MAC and shared antenna, so 5GHz WLAN and 2.4GHz BT simultaneously is indeed possible (i.e. 5G softAP with BLE).

We have a device coming out later in the year which can take advantage of a dual antenna path and LNAs, and this will be optimal for 2.4GHz WLAN and simultaneous BT.

Remember though that the original question references 5GHz WLAN and 2.4GHz BT simultaneously – not 2.4GHz WLAN and 5GHz WLAN – that’s only possible with RSDB.

Hope this helps.