HT66F15 difficult to decrypt - MCU decryption

HT66F15 parameters: FLASH Size (prog): 4K Internal RAM Size: 192Bytes Data E2PROM nom (B): - PWM: 1 * 10bit LCD (comxseg): - A / D Converter: 4 * 12bit D / A Converter: - Serial Interface : - PKG Type: DIP24 / SOP Stern Shenzhen Special Technology Co., Ltd. is a company specializing in the development, design, production of intelligent control panels, controllers and products of technology companies! SCM program development for clients, Dashboard development, electronic product design, industrial automation and control systems design, electronic circuit hardware and software design, and to undertake OEM / ODM orders! Stern Technology Co., Ltd. has a strong R & D capabilities, rich development team, can complete a full solution for the control panel, electronics and industrial automation products: from product design, electronic circuit hardware design, control circuit boards PCBA design, PCB circuit board design, MCU program development, EMC solution to embedded software, PC PC software, APP Software (IOS, Android) appearance of industrial design, ID design and prototype production, to the late product circuit board production, SMT paste film processing, DIP-stage welding process, functional testing, aging testing one-stop service! Stern Special Technology Co., Ltd. has developed mature programs include coffee machines, automatic coffee center, PID control mixers, vacuum sealed bags, filters, air cleaners, the Bluetooth control electric fireplace, cold wine machine, wine cooler, bicycle lights, foam machine, food processor, ice cream machines, electronic kettle, electronic tea pot, Bluetooth headsets, Bluetooth speakers, professional noise canceling headphones, Bluetooth + noise canceling headphones, electronic ovens, smart charger, straight hair, networking products, power tools and so on. Including control panels, software design, hardware design, EMC solution to product appearance ID, structure design and so on! Products are sold worldwide in different regions, in line with national standards, including when limited to UL, FCC, CB, CE, CCC, SAA, PSE, KTL and other standards!