For more detailed information about Deep Sleep on a specific part, please refer to the device’s data sheet. Application Note AN879, “Using the Microchip Ultra Low-Power Wake-Up Module”, describes the ULPWU feature in more detail, including equations for calculating capacitor values and delay times. If using a part that does not include data EEPROM, please view Application Note AN1095 “Emulating Data EEPROM for PIC18 and PIC24 Microcontrollers and dsPIC® Digital Signal Controllers”. This covers how to use FLASH program memory while improving endurance by a factor as high as 500.