Analog Devices ADRV9001 User Manual page 327

Reference Manual ADRV9001
ADRV9001 EVALUATION SYSTEM
GPIO Configuration
Use this tab to configure the various GPIO pins for multiple functions, such as power savings, attenuation control, gain control, and hop control
pins.
Set the System Power Savings in this tab to configure the monitor mode saving level to apply to the part. This section also allows to assign
the enable pin for the power saving mode.
Use the DGPIOs on the evaluation board from DGPIO_0 to DGPIO_11 for feedback signals as well as to set the gain index for Rx Gain
Control.
Use the Tx Attenuation Control to assign the pins to increment and decrement the gain using the pin mode.
Configure the GPIO pins to control the hop tables, table index, and gain/attenuation pins.
Figure 311. GPIO Tab
Receiver Gain Control
The receiver Gain Control tab (Figure 312) configures the receiver gain control mode per channel. Apply the configuration selected in that tab
to the ADRV9001 during initialization. During run time, change the interface gain as well as if the manual mode is enabled, then change the
receiver gain.
Interface Gain selects MSBs or LSBs 16 bits from the data bus. This operation can be interpreted as a signal gain. In TDD operation, there is
the option to update the interface gain Now or in the Next Frame. For more details, see the Receiver Gain Control section.
Select the Manual radio button in the Gain Control Mode to select the initial gain value. Change the receiver gain dynamically during the
receiver capture operation.
Select the Automatic radio button in the Gain Control Mode to configure the basic ADRV9001 internal AGC parameters. The AGC becomes
operational and automatically adjusts the receiver gain level when the ADRV9001 starts to receive data in the Receive tab. See the Receiver
Gain Control section for more information about the AGC operation.
Select Digital Correction or Digital Compensation for the Digital Gain operation.
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