The MC33793 is designed to be used with a sensor or actuator at a location that is remote from a centralized MCU. This device provides power, measurement, local logic I/O and communications between the remote sensor and the centralized MCU over a DSI bus. Sensors such as accelerometers can be powered from the regulated output of the device and the resulting analog value from the sensor can be converted by the MC33793 from an analog level to a digital value for transmission over the DSI bus in response to a query from the MCU. Four I/O lines can be configured by the central MCU over the DSI bus. as analog inputs, digital inputs or digital outputs. This allows more than one sensor to be remotely controlled and measured by a single MC33793. Additionally, a high drive logic output is provided which can be used to power other low-power sensors or indicators. The MC33793 can replace an MCU and its supporting hardware in remote measurement and control applications, resulting in a significant cost reduction.
Features
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Four channel 8 bit A-to-D converter
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Four pins configurable as analog or logic inputs or as logic outputs
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Provides regulated +5.0 V output for sensor power from bus
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Additional high-drive logic output
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On-board clock (no external elements required)
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Field programmable address
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Default and field programmable as a DSI daisy chain device
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Recognizes reverse initialization for open bus fault tolerance