Select from the list of peripherals whether to freeze or not on program halt. The available peripherals are device dependent.
PIC12/16/18 MCU Devices
To freeze/unfreeze all device peripherals on halt, check/uncheck the “Freeze on Halt” checkbox. If this does not halt your desired peripheral, be aware that some peripherals do not have a freeze-on-halt capability and cannot be controlled by the debugger.
dsPIC30F/33F, PIC24F/H and PIC32MX Devices
For peripherals in the “Peripherals to Freeze on Halt” list, check to freeze that peripheral on a halt. Uncheck the peripheral to let it run while the program is halted. If you do not see a peripheral on the list, check "All Other Peripherals". If this does not halt your desired peripheral, be aware that some peripherals do not have a freeze-on-halt capability and cannot be controlled by the debugger.
To select all peripherals, including “All Other Peripherals”, click 'Check All'. To deselect all peripherals, including “All Other Peripherals”, click 'Uncheck All'.