7.4 Device Functional Modes
The PGA460-Q1 device functional modes as defined as:
Active modeAfter the power-up sequence is complete, the device waits for a BURST/LISTEN or LISTEN ONLY command to drive the transducer, and amplify and condition the received echo. In this mode, the device can also be configured with various parameters, and data about the detected object can be queried from the device. All these functions are achieved using commands defined in Interface Description section.
Low-power modeThe device can be configured to go to this mode after a defined period of inactivity as defined in Low-Power Mode section. In this mode most of the blocks are turned off to dramatically reduce current consumption. The device can come out of this mode with commands on the interface as described in the Time-Command Interface and UART Interface section. In this mode, the device cannot burst or listen for an echo. All configuration stored in volatile memory is also lost. This includes all threshold timing and level values.