DS2480解密(破解)

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    关于DS2480基本描述：
    The DS2480 is a serial port to 1–Wire interface chip that supports standard and Overdrive speeds. It connects directly to UARTs and 5V RS232 systems. Interfacing to RS232C (± 12V levels) requires a passive clamping circuit and one 5V to ± 12V level translator. Internal timers relieve the host of the burden of generating the time– critical 1–Wire communication waveforms.Inaddition, the DS2480 can be set to communicate at four different data rates including 115.2 kbps, 57.6 kbps and 19.2 kbps with 9.6 kbps being the power–on default. Command codes received from the host’s crystal controlled UART serve as a reference to continuously calibrate the on–chip timing generator. The DS2480 uses a unique protocol that merges data and control information without requiring control pins. This approach maintains compatibility to off–the–shelf serial to wireless converters allowing easy realization of 1–Wire media jumpers. The various control functions of the DS2480 are optimized for MicroLAN 1–Wire networks and support the special needs of all current 1–Wire devices including the Crypto iButton, EPROM–based Add–Only Memories, EEPROM devices and 1–Wire Thermometers.
　　DS2480 FEATURES：
　　Universal, common–ground serial port to 1–WireTM line driver for MicroLANTM applications
　　Works with all iButtons and MicroLAN–compatible 1–Wire slave devices
　　Communicates at regular and Overdrive 1–Wire speed and serial port data rates of 9600 (default),19200, 57600 and 115200 bps
　　Supports 12V EPROM programming and stiff 5V pull–up for Crypto iButton, sensors and EEPROM
　　Self–calibrating time base with ±5% tolerance for serial and 1–Wire communication
　　Slew rate controlled 1–Wire pull–down and active pull–up to accommodate long lines and reduce radiation
　　User–selectable RXD/TXD polarity minimizes component count when interfacing to 5V based RS232 systems or directly to UARTs
　　Programmable 1–Wire timing and driver characteristics accommodate a wide range of MicroLAN configurations at regular speed
　　Smart protocol combines data and control information without requiring extra pins
　　Compatible to optical, IR and RF to RS232 converters
　　Low cost 8–pin SOIC surface mount package
　　Operates over 4.5V to 5.5V from –40°C to +85°C