Port multiplexing - PowerPoint PPT Presentation

ECE 447 Fall 2009

ECE 447 Fall 2009. Lecture 6: TI MSP430 IO Interfacing. Agenda. Internal/External Resistors LEDs Switch Debouncing Buffers Port Multiplexing. ECE 447: MSP430 Current Limits. V DD = 3 V. Maximum sink current. V OHmin = 2.4 V. I OLmax = 40 mA. Maximum source current.

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ECE 447: Lecture 6

ECE 447: Lecture 6. Input/Output Interfacing LEDs, Button Switches &amp; Port Multiplexing. ECE 447: 68HC11 Current Limits. V DD =5 V. Maximum sink current. V OHmin =4.5 V. I OLmax = 1.6 mA. Maximum source current. I OHmax = 0.8 mA. V OLmax = 0.4 V. GND=0 V.

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ECE 447: Lecture 11

ECE 447: Lecture 11. Port Multiplexing. ECE 447: Port Multiplexing. Allow multiple devices to share the input and output ports of the microcontroller. Additional hardware typically needed to support connection and selection of peripheral devices.

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158 views • 7 slides

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