Available in 64-, 100-, or 121-pin packages, eXtreme Low Power PIC24F "GB4" MCUs include integrated hardware crypto engine with both OTP and Key RAM options for secure key storage, up to 256 kB of Flash memory, and direct drive for segmented LCDs. Dual-partition Flash with Live Update capability allows devices to hold two independent software applications, and permits simultaneous programming of one partition while executing application code from other partition.