Follow the steps below to synchronize two MAX30005:
1. Connect the same 32.768KHz clock to two CLK input of the two MAX30005
2. Enable PLL of two MAX30005 to select external clock.
3. Only enable one interrupt of the MAX30005.
4. Start the two MAX30005 chips at the same time by writing the same commands to the two ICs at the same time.
5. When interrupt occurs, read the same data from two MAX30005.