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关于DS2482-100单片机
The DS2482-100 is an I?C_ to 1-Wire_ bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I?C masters to perform bidirectional protocol conversion between the I?C master and any downstream 1-Wire slave devices.Relative to any attached 1-Wire slave device, the DS2482-100 is a 1-Wire master. Internal factory trimmed timers relieve the system host processor from generating time-critical 1-Wire waveforms,supporting both standard and Overdrive 1-Wire communication speeds. To optimize 1-Wire waveform generation, the DS2482-100 performs slew rate control on rising and falling 1-Wire edges and provides additional programmable features to match drive characteristics to the 1-Wire slave environment.Programmable strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. The DS2482-100 combines these features with an output to control an external MOSFET for enhanced strong pullup application. The I?C slave address assignment is controlled by two binary address inputs, resolving potential conflicts with other I?C slave devices in the system.
DS2482-100 FEATURES
I2C Host Interface, Supports 100kHz and 400kHz
I2C Communication Speeds
1-Wire Master IO with Selectable Active or Passive 1-Wire Pullup
Provides Reset/Presence, 8-Bit, Single-Bit, and Three-Bit 1-Wire IO Sequences
Standard and Overdrive 1-Wire Communication Speeds
Slew Controlled 1-Wire Edges
Selectable 1-Wire Slave Presence-Pulse Falling Edge Masking to Control Fast Edges on the 1-Wire Line
Supports Low-Impedance 1-Wire Strong Pullup for EEPROMs, Temp Sensors, or Other 1-Wire Slaves that have Momentary High Current Modes
2 Address Inputs for I2C Address Assignment
Wide Operating Range: 2.9V to 5.5V, -40°C to +85°C
8-Pin, 150-mil SO Package
