Now for a look at how to use the AD converter in combination with Snooze mode. Here again, a hardware trigger is used; in this case from the Internal Interval Timer. Here the upper and the lower values of the window function must be set, after which the device has to be put into Stop Mode or Snooze Mode. After the Interval Timer elapses, the AD conversion is started automatically, without using the CPU core. The conversion is then performed and the result is automatically compared with the previously set upper and lower limits. If the value is outside the range, then the AD converter stops operation and the device goes back into Stop Mode - with a very low power consumption of just 0.52µA. After the next cycle of the interval timer, the AD converter is triggered automatically again and does another conversion. This time if the conversion result is inside the valid range, a wake up will be generated and the core starts working to process the data from the AD converter. In Deep Stop Mode the power consumption is just 0.25µA and when the AD converter is running in Snooze Mode it’s about 800µA depending on the mode used. If the core is running with FLASH switched on, the power consumption is in the range of 1.4mA at 8MHz operation speed.