st17h65bf is a system on chip (soc) for apple find my applications. it has arm® cortex™- m0 32-bit processor with 64k retention sram, 512kb-2mb flash, 96kb rom, 256bit efuse, secure vault. also, st17h65bf can support ble with security, application and over-the-air download update. serial peripheral io and integrated application ip enables customer product to be competitive.