Specifications

Modem Status, Customization, and Reset Commands
Rev. 8 May.12 Proprietary and Confidential 33
!ANTSEL
Supporting chipsets:
• MDM9200 (min f/w rev:
9200X 1.0 Release 2)
• MDM9600
Set/query external antenna select configuration
(This command is supported only on Mini Card devices.)
Configure the device to drive (high or low) up to four GPIOs for specific bands. (If a
GPIO is not needed for a specific band, it is identified as not required.)
When the device switches to a configured band, the GPIOs are driven as specified, and
the host uses those GPIOs to tune the external antenna appropriately. Note that this
feature is independent of the radio technology being used. For example, Band 5
corresponds to any 850-band technology (CDMA, WCDMA, LTE, GSM).
Note: Any change to GPIO configurations take effect after the modem is reset.
Note: System level testing should be performed 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 µs (recommended) and < 10 µs (maximum).
Usage:
• Execution: AT!ANTSEL=<band>, <gpio1>, <gpio2>, <gpio3>[, <gpio4>]
Response:
OK
Purpose: Configure the GPIOs for the specified <band>.
• Query: AT!ANTSEL?
Response:
BAND <band a >: <gpio1>, <gpio2>, <gpio3>[, <gpio4>]
BAND <band
b >: <gpio1>, <gpio2>, <gpio3>[, <gpio4>]
...
OK
Purpose: Display the current external antenna select configuration.
• Query List: AT!ANTSEL=?
Purpose: Display valid execution format and parameter values.
Parameters:
<band> (RF band)
• 3GPP band number. For a full listing of 3GPP band numbers, see Ta b le 4- 2 on
page 280.
• Valid range: 0–60. Band support is product specific—see the device’s Product
Specification or Product Technical Specification document for details.
<gpio1>, <gpio2>, <gpio3>, <gpio4> (GPIO configurations. Note: <gpio4> availability is
device-specific—see the appropriate Product Technical Specification for details.)
• 0=Logic low
• 1=Logic high
• 2=Not used for antenna selection (Default value for <gpio4>.)
Table 3-2: Modem status, customization, and reset commands (Continued)
Command Description