In our configuration:
- START line is held high
- Using SPI commands (SYNC, SLEEP, WAKEUP) rather than IO lines for control.
- SDATAC command has been given to disable continuous conversions
- Using DRDY- interrupts to signal conversion complete
As per section 10.1.7, a SYNC command will initiate conversions. When I'm finished doing some conversions, I issue a SLEEP command to save power.
When I'm ready to do more conversions, do I need to issue a WAKEUP command, or will another SYNC command do the same thing?
What happens if the system is awake and I issue a WAKEUP rather than a SYNC?
In other words, what are the key differences between WAKEUP and SYNC commands? In what way are they (and are they not) interchangeable?