Analog Devices ADRV9001 User Manual page 82

Reference Manual ADRV9001
MICROPROCESSOR AND SYSTEM CONTROL
enableRiseToAnalogOnDelay + enableSetupDelay.
In such a case, after raising Tx_enable, send some guard data over the interface to ensure all valid transmit data is transmitted on air. Based on
the length of the user guard time and transmit timing parameter configurations, only a part or none of the guard data is transmitted to the air.
When the frame ends, set enableFallToOffDelay similar to use case 1.
Figure 67. Transmit Timing Parameters (t < t )
TxPD TxEnaSetup
Receive Timing Definition
Receive timing parameters define the events from the start of reception at the air to the end when the receive burst is sent through the
ADRV9001 data port to the BBIC.
Figure 68. Receive Timing Parameters
Figure 68 shows that a receive burst has a series of valid receive data with the option to pad guard data at the beginning and end of the valid
data. Similar to transmit, based on the configured timing parameters, receive full or partial guard data, and ensure the guard data usage is
compliant with the standard requirement. Control the RX_ENABLE pin to signal the ADRV9001 the start and end of a receive burst at the air
(note: RX_ENABLE must rise before the start of the receive burst at air to power up the AFE.). Based on the RX_ENABLE signal and a set of
configured receive timing parameters, the ADRV9001 further controls receive analog components, receive interface, and the external LNA (if it
is controlled by the ADRV9001 instead of the user) to make sure the received burst is sent to BBIC at the deterministic time as desired.
analog.com Rev. 0 | 82 of 351