I am frequently asked if the firmware on a particular Easytouch system can be updated so that a particular fix or feature can be taken advantage of. The answer to that question is "it depends on whether you've got an Easytouch 1 or an Easytouch 2" . Say what?! Pentair don't advertise the Easytouch systems as a 1 or a 2 but they are currently on their second hardware revision. The first revision is referred to as the Easytouch 1, and the second is - you guessed it - the Easytouch 2... but what is the difference and why would you care? First, a smidge of background... the Easytouch (and Intellitouch and Suntouch) equipment uses the Motorola 68HC12 family of microcontrollers, now made by Freescale. Pentair uses the MC9S12A derivative which is basically an HC12 with some performance enhancements. The first Easytouch version, the Easytouch 1, used the MC9S12A64 which has 64 kilobytes of flash memory for storing the program or "firmware" that the boa...