
WLAN
CC3235MODx
BLE
CCxxxx
RF_ABG
RF
Coex IO
CC_COEX_BLE_IN
Dual-band Antenna
BLE Ant.
80
SWRS224A – FEBRUARY 2019 – REVISED AUGUST 2019
Product Folder Links:
Applications, Implementation, and Layout
Copyright © 2019, Texas Instruments Incorporated
(1)
When selecting Autoselect via the API, a reset is required in order for the CC3235MODx device to determine the best antenna for use.
(2)
Refer to the
Uniflash with Image Creator User Guide
for more information.
shows the dual antenna implementation of a complete Bluetooth
®
low energy and WLAN
coexistence network with the WLAN operating on either a 2.4- or a 5 GHz band. Note in this
implementation no Coex switch is required and only a single GPIO from the BLE device to the CC3235x
device is required.
Figure 7-1. Dual-Antenna Coexistence Mode Block Diagram
7.1.2
Antenna Selection
The CC3235MODx device is designed to also support antenna selection and is controlled from Image
Creator. When enabled, there are 3 options possible options:
•
ANT 1: When selected, the GPIOs that are defined for antenna selection with set the RF path for
antenna 1.
•
ANT 2: When selected, the GPIOs that are defined for antenna selection will set the RF path for
antenna 2.
•
Autoselect: When selected, during a scan and prior to connecting to an AP, CC3235MODx device will
determine the best RF path and select the appropriate antenna
(1) (2)
. The result is the saved as port of
the profile.