Monitor Mode - Analog Devices ADRV9005 Reference Manual

Reference Manual
POWER SAVING AND MONITOR MODE
ADI_ADRV9001_POWERSAVINGANDMONITORMODE_SYSTEM_MODE_LDO = 4, /*!< LDO power down */
ADI_ADRV9001_POWERSAVINGANDMONITORMODE_SYSTEM_MODE_ARM = 5 /*!< ARM power down */
} adi_adrv9001_PowerSavingAndMonitorMode_SystemPowerDownMode_e;

MONITOR MODE

Monitor mode is an enhanced sleep mode which includes automatic wake-up on signal detection. Monitor mode allows for autonomous
detection of carrier signals in power saving mode. This enables the ADRV9001 and the host digital baseband processor (DBB) to stay in sleep
mode during the idling (not active) state.
During the monitor mode operation, the ADRV9001 goes through cycles of sleeping and detection. In the sleep mode, most of the ADRV9001
is powered down as described in the
embedded ARM processor are woken to perform the detection. Since the carrier detection is performed autonomously by the ADRV9001, no
input is needed from the DBB so it can stay in full sleep mode until a carrier signal is detected. Monitor mode allows for greater system power
savings by enabling both the ADRV9001 and the DBB to stay in sleep mode for the duration of the idling state.
Figure 196 shows a block diagram of the waking/sleeping sections of the ADRV9001 during monitor mode operation. In normal operation,
ADRV9001 and the DBB are fully powered up. During the idle time, ADRV9001 periodically sleeps and detects. The DBB can sleep for the
full idle time. In the sleep state, ADRV9001 is in full power down mode. In the detecting state, only a portion of the Rx signal chain and the
embedded ARM processor are woken up (highlighted).
Figure 197shows a typical monitor mode operation, in which the baseband processor fully controls the operation before it enables the
ADRV9001 into the monitor mode. First, the baseband processor sets the monitor mode configuration through an API command. Then, the
baseband processor asserts the monitor enable pin (specified by a DGPIO) to move the ADRV9001 into the monitor mode, and the baseband
processor itself can go into a sleep state until it is woken up by the ADRV9001 or other system interrupt. During the monitor mode, the
ADRV9001 fully controls itself to perform the sleep-detection cycling. The sleep/detection cycle of the ADRV9001 is continuous unless the
configured detection method detects a valid signal, or it is terminated by a baseband processor pulling down the monitor enable pin. The initial
sleep and detection durations are user configurable, and users can decide on detection first or sleep first when the ADRV9001 is transitioned
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Power Saving and Monitor Mode
Figure 196. Monitor Mode Block Diagram
section. In the detection mode, a portion of the Rx signal chain and
ADRV9001
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