AirPrime WP8548 / WP75xx / WP76xx / WP77xx AT Command Reference
34
Proprietary and Confidential - Contents subject to change
4118047
!ANTSEL
Set/query external antenna select configuration
Configure the modem to use GPIOs (GPIO28–31) to select the antenna to use for each
specified frequency band. (Any of the available GPIOs that are not needed for a specific band
should be configured as not required.)
When the modem switches to a frequency band that has been configured using this
command, the GPIOs are driven as specified and the host uses them to tune the external
antenna appropriately.
If the modem switches to a band that has not been configured, the host uses the default
antenna.
Note: Frequency bands are RAT-independent. For example, Band 5 corresponds to any 850-
band technology (CDMA, WCDMA, LTE, GSM).
Requirements:
Before this command can be used:
•
Antenna selection is the secondary configuration for GPIO28–GPIO31. To use these
GPIOs for antenna selection, use
to deallocate them from their current
purpose(s).
Notes:
When designing the system, and configuring the device:
•
Perform system level testing to ensure that the antenna switching feature does not
introduce any handover issues. The tunable antenna should be designed to ensure that it
can retune in < 5
µ
s (recommended) and < 10
µ
s (maximum).
Password required:
Yes (see
for details)
Reset required to apply changes:
Yes
Usage:
•
Execution:
AT!ANTSEL=<band>, <gpio1>, <gpio2>, <gpio3>[, <gpio4>]
Response:
OK
Purpose:
Configure the GPIOs for the specified <band>.
•
Query:
AT!ANTSEL?
Response (WPx5xx):
BAND <band
a
>: <gpio1>, <gpio2>, <gpio3>[, <gpio4>]
BAND <band
b
>: <gpio1>, <gpio2>, <gpio3>[, <gpio4>]
...
OK
Note: The WPx5xx response (as of publication date) appears as "ANTSEL <band
a
>: ....".
This will be corrected to display "BAND <band
a
>: ..." in a future firmware release.
(Continued on next page)
Table 3-2: Modem Status Command Details (Continued)
Command
Description
